® OWNERS MANUAL: Handling & Safety Instructions Read the instructions and warnings in this manual carefully before using this firearm; do not discard this manual. This instruction manual should always accompany this firearm and be transferred with it upon ownership, or when the firearm is loaned or presented to another person.
State-By-State Warnings Certain states require, by law, that their own specified warning notices, in larger-than-normal type be conspicuously included by the manufacturer, distributor, or retail dealer with firearms sold in that state. SIG SAUER sells its products in compliance with applicable laws and regulations. Because our products may be sold in these states, we include the following: CALIFORNIA: WARNING “Children are attracted to and can operate firearms that can cause severe injuries or death.
MAINE: “ENDANGERING THE WELFARE OF A CHILD IS A CRIME. IF YOU LEAVE A FIREARM AND AMMUNITION WITHIN EASY ACCESS OF A CHILD, YOU MAY BE SUBJECT TO FINE, IMPRISONMENT OR BOTH. KEEP FIREARMS AND AMMUNITION SEPARATE. KEEP FIREARMS AND AMMUNITION LOCKED UP. USE TRIGGER LOCKS.” MARYLAND: “WARNING: Children can operate firearms which may cause death or serious injury.
NEW YORK CITY, NY: “THE USE OF A LOCKING DEVICE OR SAFETY LOCK IS ONLY ONE ASPECT OF RESPONSIBLE FIREARMS STORAGE. FOR INCREASED SAFETY, FIREARMS SHOULD BE STORED UNLOADED AND LOCKED IN A LOCATION THAT IS BOTH SEPARATE FROM THEIR AMMUNITION AND INACCESSIBLE TO CHILDREN AND OTHER UNAUTHORIZED PERSONS.
THE BASIC RULES OF SAFE FIREARMS HANDLING 1. ALWAYS treat every gun as if it were loaded. 2. ALWAYS be sure the barrel is clear of any obstruction. 3. ALWAYS be sure of your backstop, what lies beyond, and the safety of bystanders before you shoot. 4. ALWAYS use clean, dry, original factory-made ammunition of the proper type and caliber for your gun. 5. ALWAYS wear ear protection and safety glasses when shooting. 6.
WARNING - LOCKING DEVICES This firearm was originally sold with a key- operated locking device. While it can help provide secure storage for your unloaded firearm, any locking device can fail. All guns are designed to fire if they are loaded and the trigger is pulled. Therefore, never install the locking device inside the trigger guard or in any way that makes it possible to pull the trigger! Do not leave the keys in the lock.
FIREARMS SAFETY IS YOUR RESPONSIBILITY This owner’s manual is designed to assist you in learning how to use and care for your SIG SAUER® rifle properly. Only when you are certain that you fully understand this manual and can properly carry out its instructions, should you practice loading and firing your firearm with live ammunition. Having a gun in your possession is a full-time job; you cannot guess and you cannot forget. You must know how to use your firearm safely.
TABLE OF CONTENTS Topic Page State-By-State Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 The Basic Rules of Safe Firearms Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Locking Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Topic Page Operation of Safety in Select Fire Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 The Bolt Catch Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Ammunition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Topic Page Magazine Inspection and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Transportation & Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 7.0 Sight Options . . . . . .
WARNINGS OF GREAT IMPORTANCE ARE FOUND WITHIN THIS MANUAL Locking Devices Alterations Sights Manual Safety Ammunition Lead Exposure Handling 6 12 25 33 33, 36 36 37, 42 Loading Firing Unloading Storage Parts Purchasers Shipping 38 42 44 65 72 75 OTHER CAUTIONS AND WARNINGS APPEAR THROUGHOUT THE MANUAL FIREARMS ARE DANGEROUS WEAPONS READ THE INSTRUCTIONS AND WARNINGS IN THIS MANUAL THOROUGHLY AND CAREFULLY BEFORE USING. www.sigsauer.
WARNING - ALTERATIONS This product was designed to function properly in its original condition. Alterations can make it unsafe. Do not alter any part or add or substitute any parts or accessories not manufactured by SIG SAUER Inc. to be compatible with this firearm. DO NOT ALTER ANY GUN 12 www.sigsauer.
GENERAL SAFETY INFORMATION AND MECHANICAL CHARACTERISTICS 1.0 Safety Information The safety warnings in this manual are important. By understanding the dangers inherent in the use of any firearm, and by taking the precautions described herein, you can enjoy a greater level of safety in the use of your rifle. Failure to heed any of these warnings may result in serious injury to you or others, as well as severe damage to the firearm or other property. SIG SAUER Inc.
1.1 Protect Your Eyes And Ears Always wear safety glasses and ear plugs or “earmuff” type protectors whenever you are shooting. Always make certain that persons close to you are similarly protected. Unprotected eyes may be injured by powder, gas, carbon residue, lubricant, metallic particles, or similar debris which may emanate occasionally from any firearm in normal use. Without ear protection, repeated exposure to shooting noise may lead to cumulative, permanent hearing loss. 2.0.
2.1.2 Barrel With Receiver And Gas System The barrel is mechanically mated to the receiver. The flash suppressor is screwed onto the muzzle end of the barrel which features a 0.5 x 28 TPI thread pattern. The gas block, which is fixed on the barrel, contains the gas port, locates the gas system (gas tube and operating rod), accepts the front sight and also serves as support for the handguards. The receiver guides the bolt and bolt carrier, and houses the locking system.
2.1.3 Bolt The bolt consists of two main parts: • Bolt Carrier • Bolt Head a. Bolt Carrier: The bolt carrier guides the bolt head, controls the locking and unlocking by means of the cam, holds the operating rod, and cocks the hammer. b. Bolt Head: The bolt head locks the bolt assembly, houses the firing pin and extractor and feeds the cartridges from the magazine to the chamber. Bolt Carrier 16 Bolt HEAD www.sigsauer.
2.1.4 Handguards The handguards protect the barrel and the gas system from damage and provide protection from burning. The integrated accessory mounting slots provide attachment points for various devices once 1913 rail sections are attached, , such as lights, lasers, sights, and bipods. aluminum HANDGUARD www.sigsauer.
2.1.5 Trigger Casing Assembly and Butt Stock The trigger casing assembly contains the internal components of the firing and safety mechanisms, bolt catch, magazine well, magazine release, and butt stock assembly. The safety lever, located on both sides of the trigger casing, can be set to three positions (Auto or 2 position Semi-only): Position “S”: The weapon is locked in the safe position. Position “F”: The weapon will fire semi auto. Position “A”: The weapon fires in the full auto mode.
WARNING – Be careful of accidental discharges when inserting gloved fingers into the trigger guard. The SIG556xi rifle is equipped with a side folding stock, featuring integral sling attachment points. CHEEK REST sling attachment recoil pad www.sigsauer.
2.1.6 Gas Valve Position The gas volume required for the function of the SIG556xi rifle can be controlled by the gas valve. The gas valve has three positions: a. Position 1 (Rib of gas valve in vertical position). Under normal conditions, the gas valve should remain in Position 1. This will give the best all-around performance and function. b. Position 2 (Rib of gas valve in the slanted position). c. Position 3 (Suppressed Setting) POSition 1 - Rib VERTICAL 20 POSition 2 - Rib SLANTED www.sigsauer.
If cycling or ejection problems are encountered due to heavy fouling, the gas valve can be moved to Position 2 by rotating clockwise as far as the stop. In this position, a larger gas volume is released against the operating rod. The need to use the gas valve in Position 2 is an indication that the rifle requires cleaning. CAUTION - In the case of a hot or heavily fouled weapon, use a cartridge or auxiliary aid to prevent burns to your fingers.
2.1.7 Butt Stock Operation 1. The butt stock provides for easy adjustment of length to accommodate the individual shooter or for storage. 2. To fold the stock, depress the latch on the left side of the rifle unlocking the stock. Fold the stock to the right until it latches on the hook located at the rear of the handguard. Ensure the stock is locked prior to firing the rifle in this configuration. 2.1.8 Sights stock latch claw hook 22 www.sigsauer.
Front Sight Elevation Adjustment Elevation adjustments are made to the front sight upon initial zeroing of the rifle. An M16A2/ M4 type front sight tool can be used to make sight adjustments. Rotating the front sight post clockwise lowers the front sight post resulting in the impact of the bullet to move upward on the target. Rotating the front sight counterclockwise raises the front sight post resulting in the impact of the bullet to move downward on the target. www.sigsauer.
BUIS Installation on the SIG556xi The SIG556xi is equipped with the SIG BUIS. This rear sight offers a rapid adjustment for range and an additional knob for windage. It also allows for a battesight zero to be set by the operator. To Install: 1. The sight must be mounted in the second to last slot of the top M1913 Rail. 2. Set the sight in the rail slot with the windage knob to the right/range scale to the left. 3. Pull the sight back rearward in the slot until it stops. 4.
WARNING - SIGHTS Do not adjust or otherwise manipulate any sight system on the rifle without first confirming the magazine is removed, the safety lever is on “SAFE” and the rifle is fully unloaded. Failure to heed this warning could result in unintentional discharge, resulting in injury or death. UNLOAD RIFLE BEFORE MANIPULATING SIGHTS. www.sigsauer.
2.1.10 Magazine The Rifle ships with one (1) 30-round magazine. The SIG556xi is compatible with M16/AR-15 type magazines. The 556xi Russian will use most AK47 type magazines. OPERATION OF SAFETY The SIG556xi has a manual safety which is located on the left and right side of the trigger casing, just forward of the rifle grip and above the trigger. The safety levers may be operated from either side. safety lever (right side of rifle) 26 www.sigsauer.
The safety is “ON” when the safety lever is in the “S” (SAFE) position and the trigger guard is closed. In this position, the rifle cannot be fired with a normal pull of the trigger. The safety lever should always be in the “S” (SAFE) position except when the shooter is actually firing the rifle. The safety lever should be moved to the “S” (SAFE) position whenever the shooter ceases firing, even temporarily.
OPERATION OF SAFETY FOR SELECT FIRE VERSIONS The SIG556xi Select Fire has a manual safety which is located on the left and right side of the trigger casing, just forward of the rifle grip and above the trigger. The safety levers may be operated from either side. The safety is “on” when the safety lever is in the “S” (SAFE) position and the trigger guard is closed. In this position, the rifle cannot be fired with a normal pull of the trigger.
WARNING DO NOT TOUCH THE TRIGGER UNTIL YOU ARE ACTUALLY READY TO FIRE THE RIFLE. The safety lever should always be in the “S” (SAFE) position except when the shooter is actually firing the rifle. The safety lever should be moved to the “S” (SAFE) position whenever the shooter ceases firing, even temporarily. The safety is “off”when the safety lever is in the “F” (FIRE), “A” (AUTOMATIC) positions.
⤴ ⤴ Left Side View semi-auto automatic Right Side View ⤴ ⤴ semi-auto 30 automatic www.sigsauer.
WARNING - MANUAL SAFETY Keep the safety “ON” unless actually firing. Always move the safety to its intended position and check it. The safety is not “ON” unless it is completely “ON.” Never depend on a safety mechanism or any other mechanical device to justify careless handling or permitting the rifle to point in an unsafe direction. The only “safe” rifle is one in which the bolt is open, the chamber is empty, and there is no magazine in the gun. KNOW HOW TO USE THE SAFETY www.sigsauer.
Bolt Catch Lever The SIG556xi rifle is equipped with a bolt catch lever. The purpose of the bolt catch lever is two-fold. The bolt catch may be manually engaged with the bolt pulled to the rear (open position). This action locks the bolt open, allowing an unobstructed view of the chamber area.
Ammunition 1. Use only high quality, original, factory-manufactured ammunition. Do not use cartridges that are dirty, wet, corroded, bent, or damaged. Do not oil cartridges. Do not spray aerosol-type lubricants, preservative, or cleaners directly onto cartridges or where excess spray may flow into contact with cartridges. Lubricant or other foreign matter on cartridges can cause potentially dangerous ammunition malfunctions. Use only ammunition of the caliber for which your firearm is chambered.
WARNING 3. Firearms may be severely damaged and serious injury to the shooter or to others may result from any condition causing excessive pressure inside the chamber or barrel during firing. Excessive pressure can be caused by obstructions in the barrel, propellant powder overloads, the use of incorrect cartridges or defectively assembled cartridges.
6. If there is any reason to suspect that a bullet is obstructing the barrel, immediately unload the firearm and look through the bore. It is not sufficient to merely look in the chamber. A bullet may be lodged some distance down the barrel where it cannot easily be seen. WARNING IF A BULLET IS IN THE BORE, DO NOT ATTEMPT TO SHOOT IT OUT BY USING ANOTHER CARTRIDGE OR BY BLOWING IT OUT WITH A BLANK OR ONE FROM WHICH THE BULLET HAS BEEN REMOVED.
WARNING - AMMUNITION Death, serious injury, and damage can result from the use of wrong ammunition, bore obstructions, powder overloads, or incorrect cartridge components. Always wear shooting glasses and hearing protectors.
TO LOAD AND FIRE (WITH MAGAZINE) 3.0 Handling 3.1 Important Instructions • Before manipulating the weapon, ensure the safety lever is in the “S” (SAFE) position and the trigger guard is in the closed position. • Use only factory-new ammunition which corresponds to the caliber of the weapon. • During all manipulations of the rifle, point the weapon in a safe direction. • Do not place your finger on the trigger until the target has been verified and you intend to shoot.
3.2 Loading The Rifle 1. Ensure the safety lever is in the “S” (SAFE) position; 2. Insert the magazine and check that it is properly seated; 3. Bolt forward: Pull the charging handle back fully and release; or 4. Bolt locked open: Depress bolt catch fully to release bolt. WARNING DO NOT LOAD A RIFLE WITH A HOT CHAMBER BECAUSE A ROUND MAY “COOK” OFF (i.e., a round may detonate (fire) unexpectedly just because it is exposed to the heat of the rifle’s chamber). 38 www.sigsauer.
3.3 Loading The Magazine 1. Ensure the magazine is the proper type and caliber for the rifle; 2. Hold the magazine vertically; 3. Place a round between the feed lips and press down - ensure the bullet is facing the front of the magazine; and 4. Place the next round on top of the previous round and repeat until the desired number of rounds are loaded. 3.4 Changing The Magazine 1. Ensure the safety lever is in the “S” (SAFE) position; 2.
3.5 Reloading (Rifle Empty, Bolt Locked Open) 1. Ensure the safety lever is in the “S” (SAFE) position; 2. Remove the magazine by pressing the magazine catch; 3. Insert a loaded magazine and check that it is properly seated; 4. Release the bolt catch fully by: a. Depress the bolt catch upward; or b. Pull the charging handle back slightly and release.
Never carry or leave unattended any firearm which is cocked and ready to fire! When cocked, it could fire from slight pressure on the trigger. An accidental discharge could easily result if you fall or drop the firearm, or if the firearm is struck or disturbed by someone or something. WARNING Never fire any firearm with your finger, hand, face, or other part of your body over or adjacent to the ejection port, or in any position where you may be struck by reciprocating movement of the breech.
WARNING - FIRING The bolt automatically opens and shuts quickly while firing. Keep face and hands away from it. Hot brass and powder gas is ejected quickly and can burn you. The rifle should be fired from the right shoulder. Always wear shooting glasses and hearing protectors. BOLT OPENS FAST – HOT BRASS EJECTED WARNING - HANDLING If dropped or struck with the safety “off,” the rifle may fire.
TO UNLOAD MAGAZINE AND RIFLE 4.0 Unloading 1. Ensure the safety lever is in the “S” (SAFE) position. 2. Ensure bolt is locked open (chamber visible); 3. Remove magazine by depressing the magazine catch; and 4. Verify the chamber is empty, both visually and physically. Always make sure the muzzle is pointed in a safe direction! Remember to clear the chamber after the magazine has been removed.
WARNING - UNLOADING Removing cartridges from the magazine does not prevent the rifle from being fired! When there is a cartridge in the chamber and the safety lever is in the “F” (FIRE) position, the cartridge will discharge if the trigger is pulled. It is absolutely essential for the user to know how to completely unload the rifle. “Completely” means emptying the magazine and removing a chambered cartridge. The safety lever should always be in the “S” (SAFE) position when the rifle is being unloaded.
TO EXTRACT AND EJECT A CHAMBERED CARTRIDGE When the rifle is fired, the same gas pressure which drives the bullet forward also acts through the cartridge case to push the bolt to the rear. That action causes extraction and ejection of the fired case. But, when the bolt is operated by hand, there can be a failure to extract the cartridge from the chamber, or a failure to eject the cartridge clear of the rifle.
TO CLEAR A MALFUNCTION (“JAM”) 5.0 Procedures In Case Of Malfunction Should the rifle fail to fire, perform the following actions: • Cycle the bolt; and • Continue firing. If the rifle does not fire after cycling the bolt: • Insert a fresh magazine; • Cycle the bolt; and • Continue firing.
If the rifle still will not fire: • Put safety lever in the “S” (SAFE) position; • Unload per section 4.0; • Clean weapon per section 8.1; • Load; and • Place safety lever on position “F” (FIRE), and continue firing. If the rifle malfunction cannot be corrected, the rifle should be returned to SIG SAUER Inc. for evaluation by a factory trained technician.
WARNING A cartridge fires when the firing pin impacts the primer, and also can be “discharged” before it is chambered if its primer receives a sharp blow. If a cartridge hangs up, jams, or binds when being chambered or when fed from the magazine into the chamber, do not attempt force it into the chamber by pushing or striking the charging handle. Any jam or feeding problem is a signal to immediately stop using the rifle until the issue can be determined.
TO DISASSEMBLE 6.0 Field Strip Disassembly 1. Unload rifle (see section 5.0) – visually and physically check to ensure the rifle is clear of all ammunition; takedown pin 2. Ensure the bolt is forward; 3. Retract the takedown pin (rear pin) – this pin is captured and does not fully remove; step 3 4. Retract the pivot pin (front pin). This pin is captured and does not fully remove. 5. Separate the trigger casing from the receiver; PIVOT PIN step 4 www.sigsauer.
6. Depress the charging handle catch and remove the charging handle; step 7 step 6 7. Using the charging handle, push the bolt carrier assembly to the rear and remove it from the receiver; 8. Rotate the bolt head counterclockwise until the lug clears the cam and pull to remove it from the bolt carrier; ⤴ step 8 50 www.sigsauer.
9. Handguard Removal: NOTICE DO NOT REMOVE THE HANDGUARD ASSEMBLY UNLESS THE UPPER AND LOWER RECEIVERS ARE SEPARATED. REMOVAL OF THE HANDGUARD WILL EXPOSE THE PUSHROD ASSEMBLY. SHOULD THE RIFLE FALL OR STRIKE A HARD SURFACE, THE PUSHROD ASSEMBLY COULD BE DAMAGED EFFECTING OPERATION OF THE RIFLE. SEPARATING THE RECEIVERS REDUCES THE OVERALL WEIGHT OF THE RIFLE REDUCING THE RISK OF DAMAGE SHOULD THE RIFLE FALL OR STRIKE A HARD OBJECT OR SURFACE. EXPLODED VIEW OF handguard www.sigsauer.
a. Push out pivot pin. b. Slide handguard off toward muzzle of barrel. C. Remove the upper rail section. Note: The flip up front sight (if installed) will have to be removed to left off the upper rail section. STEP 9C REMOVAL OF THE LOWER HANDGUARD SECTION 10. Lift upper handguard at the rear and pull away from gas block; step 10 REMOVAL OF UPPER RAIL SECTION 52 www.sigsauer.
⤴ 11. Depress the detent and rotate the gas valve until the flange is clear and the valve can be pulled forward out of the gas tube; step 11 12. Push the operating rod assembly forward and remove from the gas tube; step 13 step 12 www.sigsauer.
13. Pull the gas tube forward out of the gas block; 14. Remove the firing pin: a. Depress the firing pin by pressing the rear of the bolt head against a flat surface until flush and hold; b. Remove the firing pin stud using an aid (small punch, nail, or pencil) and SLOWLY raise the bolt head until tension is released on the firing pin spring; and c. Remove firing pin and firing pin spring from the bolt head. step 15B step 15C CAUTION The firing pin is under spring tension when installed in the bolt head.
www.sigsauer.
6.1 Reassembly The rifle should always be reassembled in the reverse order of disassembly: 1. Install the firing pin: a. Insert the firing pin and firing spring into the bolt head. The spring should be at the rear. Ensure that the notch on the firing pin is aligned with the firing pin stud. b. With one hand, place the bolt head (firing pin at the bottom) on a flat surface and depress the firing pin until the notch in the firing pin is aligned with the hole in the bolt shaft for the firing pin stud. c.
3. Install the operating rod assembly: a. Insert the operating rod assembly into the gas tube. Ensure the end with the charging handle notch enters first, notch facing down. b. Push the operating rod in until fully seated. The operating rod should move freely through the gas tube. ⤴ step 3 step 4 4. Install the gas valve: a. Install the gas valve positioning the flange so the valve contacts the gas tube flange. b. Rotate the valve to the right until it stops against the detent. c.
5. Install the handguard: a. Place top portion of handguard back in place on upper receiver, and fit behind gas block. STEP 5a PLACING TOP PORTION OF HANDGUARD IN PLACE b. Slide the lower handguard in channel and slide rearward until stops. 58 www.sigsauer.
6. Assemble the bolt head and bolt carrier: a. Place the bolt carrier in your hand, upside down, cam to the front. b. With the notch facing up, slide the bolt head shaft fully into the bolt carrier. c. Rotate the bolt head to the left until the notch rests in the cam. d. Press forward on the firing pin until the bolt head is fully forward. 7. Install the bolt assembly into the receiver: a. Hold the receiver muzzle down. b.
8. Connect trigger casing assembly to receiver assembly: a. Mate the receiver and trigger casing together at the front takedown pin, ensuring the pivot pin holes overlap. b. Install the pivot pin from the right side and secure the pivot pin screw. c. Rotate the trigger casing until the rear takedown pin holes in the trigger casing assembly and receiver are aligned. d. Press the rear takedown pin in fully 9. Perform a function check in accordance with Section 6.2. 60 www.sigsauer.
6.2 Function Check Each time the weapon is stripped, verify its functions as follows: Sequence of Procedure 1. Unload in accordance with section 4.0. 2. Remove magazine. 3. Ensure that charging handle is forward and bolt is closed. 4. Functions: a. With safety lever on “S” execute loading cycle, pull the trigger. • Hammer must not drop, the trigger must be blocked. b. With safety lever on “F”, pull the trigger and hold it back. • Hammer must drop. With the trigger held down, cycle the weapon once.
For Select-Fire rifles only: c. Cycle the action (for Select-Fire rifles) d. Safety lever on “F” FIRE, pull the trigger and hold it back. • Hammer must drop. With hammer held back, cycle the action (allow bolt to slide forward slowly). • Hammer must drop immediately as the bolt locks up. Repeat the loading cycle. • On the third loading cycle, the hammer must not drop. Release the trigger. e. With safety lever on “A”, repeat procedure as under “3”. • Hammer must drop each time.
MAGAZINE INSPECTION AND CARE Inspect the magazine frequently. The magazine follower must move freely and have adequate spring tension so that each cartridge is quickly raised to the feeding position. The magazine lips should be clean and free of cracks, dents, or nicks, so that cartridges are held in their proper feeding position. When cleaning is necessary, use a solvent that will not rust the metal components or adversely affect the magazine follower.
CARE AND CLEANING 1. Your rifle is delivered factory packaged and preserved with a light coating of protective grease and oils. Before loading make certain that all packing grease and oil has been cleaned from the bore and exposed mechanism. 2. Before you begin to disassemble your firearm for cleaning, always double-check to make sure it is unloaded! 3. After cleaning always check to be sure that no cleaning patch or other obstruction remains in the bore or chamber! 4.
WARNING - STORAGE: Never place or store any firearm in such a manner that it may be dislodged. Firearms should always be stored securely and unloaded, away from children and other unauthorized users. Use the locking device originally supplied with this firearm for storage. The use of a locking device or safety lock is only one aspect of responsible firearms storage.
Troubleshooting Guide Malfunction Cause Correction No round fed into the chamber Magazine not properly inserted or magazine is deformed or dirty Insert magazine properly or change magazine Bolt does not close easily or completely Rifle or cartridge is fouled (dirty) or rifle is too heavily lubricated Clean and lubricate rifle and/or replace the ammunition Incorrect ammunition Replace ammunition Rifle requires service Return to SIG SAUER Insufficient recoil due to dirt Clean and lubricate the r
Malfunction Cause Correction Firing pin obstructed Inspect, clean and lubricate the rifle Faulty ammunition Manually cycle in next round Rifle requires service Return to SIG SAUER Ignition Hammer drops but round does not fire www.sigsauer.
MAINTENANCE 8.0 Maintenance All firearms require periodic maintenance and inspection which may reveal a need for adjustment or repair. Have your firearm checked by a competent gunsmith annually even if it seems to be working well, since breakage, improper functioning or corrosion of some components may not be apparent from external examination. If you notice any mechanical malfunction, DO NOT continue to use the firearm.
8.1 Cleaning The SIG556xi rifle must be cleaned after each shooting session or whenever performance is suspect. Clean the rifle as follows: 1. Unload the weapon per Section 4.0; 2. Field strip the weapon per Section 6.0; 3. Clean the barrel and chamber from the rear; 4. Clean other parts of the rifle, using care to remove carbon and firing residue. Pay particular attention to the operating rod, gas valve, and chamber areas; 5.
SERVICE AND PARTS POLICY Parts Policy Our Service Department maintains a full complement of replacement parts. Even though most gunsmiths have the knowledge, training, and the ability to make necessary repairs to your firearm, the skill and workmanship of any particular gunsmith is totally beyond our control. Should your firearm ever require service, we strongly recommend that you return it to SIG SAUER Inc. (see page 74).
WARNING - PARTS PURCHASE: It is the purchaser’s responsibility to be absolutely certain that any parts ordered from the factory are correctly fitted and installed. Firearms are complicated mechanisms and IMPROPER FITTING OF PARTS MAY RESULT IN A DANGEROUS MALFUNCTION, DAMAGE TO THE FIREARM, AND SERIOUS INJURY TO THE SHOOTER AND OTHER PERSONS. The purchaser and installer of parts must accept full responsibility for the correct adjustment and functioning of the rifle after such installation.
This page intentionally left blank. 72 www.sigsauer.
Service Policy If you have questions concerning the performance or servicing of your rifle, please write or call: SIG SAUER Inc. Attention: Customer Service 72 Pease Boulevard, Newington, NH 03801 Phone: (603) 610-3000 ext. 3 Fax: (603) 766-7002 IF YOU DO NOT UNDERSTAND THE INSTRUCTIONS FOR OPERATING YOUR RIFLE, IT IS YOUR RESPONSIBILITY TO CALL OUR CUSTOMER SERVICE DEPARTMENT AT (603) 610-3000 ext. 3 BEFORE USING YOUR RIFLE. www.sigsauer.
Shipping Firearms for Repair Returning Your Firearm For Service In the event you need to return your rifle to the SIG SAUER Service Department, here’s what to do: 1. The first step is to contact Customer Service at (603) 610-3000 ext. 3 for an RMA number. This number allows SIG SAUER to track the status of your return from its receipt at SIG SAUER through its return to you. Please do not send your firearm until you obtain an RMA number. 2.
7. Ship your firearms insured and prepaid (we do not accept collect shipments) to: SIG SAUER Inc. Attention: Service Department 18 Industrial Drive Exeter, NH 03833 This instruction manual should always accompany this rifle and be transferred with it upon change of ownership. WARNING - SHIPPING WARNING: BEFORE SHIPPING ANY FIREARM, BE ABSOLUTELY CERTAIN THAT THE FIREARM AND ITS MAGAZINE ARE UNLOADED. DO NOT SHIP AMMUNITION WITH A FIREARM.
9.0 Technical Specifications PISTOL SBR CALIBER OVERALL LENGTH (STOCK EXTENDED) PATROL 5.56x45mm NATO or 7.62x39 Russian 520.7mm (20.5 in) 757mm (29.8 in) 911mm (35.875 in) OVERALL LENGTH (W/ STOCK FOLDED) N/A 520.7mm (20.5 in) 670mm (26.375 in) BARREL LENGTH W/O FLASH SUPPRESSOR 254mm (10 in) 254mm (10 in) 407mm (16.0 in) 6 6 6 LANDS & GROOVES RATE OF TWIST WEIGHT (W/O MAGAZINE) TRIGGER WEIGHT (nearest .01 kg & .1 lb) 76 1:178mm/7 in 7.62x39 Russian 1:178mm/9.5in 2.85 kg (6.3 lbs) 3.
PISTOL SBR PATROL CYCLIC RATE 620-750 rpm 620-750 rpm 620-750 rpm SIGHT RADIUS 386mm (15.2in) 386mm (15.2in) 386mm (15.2in) Classic: 463mm (18.25in) HEIGHT 185.5mm (7.3 in) UPPER RECEIVER RAIL LENGTH 175mm (6.9 in) TOP FOREARM RAIL LENGTH 175mm (6.9 in) TOTAL TOP RAIL LENGTH (Including Gas Block) 376mm (14.8 in) MUZZLE THREAD ½-28 UNEF 5/8-24 UN All specifications are approximate and will vary with configuration. Specifications subject to change without notice. www.sigsauer.
9.1 SIG556xi Upper Parts List & Diagram 1 FLASH SUPPRESSOR, EXTENDED 2 STOP PIN SPRING PIN 3 PIN STOP 4 STOP PIN SPRING 5 GAS VALVE, FULL 6 PIN, GAS BLOCK RETAINING 7 BLOCK, GAS 8 NUT, BARREL 9 SHORT OP ROD 10 BARREL, 5.
www.sigsauer.
9.
www.sigsauer.
SIG SAUER® Limited Lifetime Firearms Warranty SIG SAUER warrants that the enclosed firearm was originally manufactured free of defects in material, workmanship and mechanical function.
Notes: www.sigsauer.
www.sigsauer.com For Product Service on this model, Please Call (603) 610-3000 ext.
