This manual was printed from a PDF and was not included with an original CMMG Rifle. If you have any doubts as to the authenticity of the any rifle that came with this manual please contact us. AR-15 5.56x45/.
Thank you for choosing CMMG, Inc. Please follow all instructions in this manual before operating firearm. Fundamental Firearm Safety Rules. 1. Always keep the firearm pointed in a safe direction. 2. Always keep your finger off the trigger until ready to shoot. 3. Always keep the firearm unloaded until ready to use. 4. Be sure the firearm is safe to operate. 5. Know how to use the firearm safely. 6. Use only the correct ammunition for the firearm. 7. Know the target and what is beyond. 8.
Table of Contents Operating Procedures Unloading and Clearing Your Rifle 1 Loading and Firing Your Rifle 3 Zeroing Your Sights 5 Basic Care and Maintenance Disassembly Instructions 7 Upper Maintenance 10 Bolt and Carrier Maintenance 12 Lower Maintenance 13 Reassembly Instructions 14 Function Check 15 Warranty Information 16 Ammunition Warning 17 Trouble Shooting Guide 19 Contact Information 23 Please familiarize yourself with this manual and the operation of your particular firearm
Unloading and Clearing Your Rifle To unload your rifle: 1. Keep your rifle pointed in a safe direction for the duration of the procedure. 2. Place your selector on “SAFE”. You cannot select “SAFE” unless the hammer is cocked. 3. Depress the magazine catch button and remove the magazine. 4. Eject the chambered cartridge by retracting the charging handle until it stops. Let the ejected cartridge fall to the ground.
Unloading and Clearing Your Rifle continued. 5. Lock the bolt open by depressing the bottom of the bolt catch. If you cannot manipulate the charging handle and the bolt catch at the same time, you can use an empty magazine, which will activate the bolt catch for you. 6. Push the charging handle forward until it clicks to re-latch the charging handle. 7. Inspect the chamber and receiver to ensure you have removed all cartridges from the action. Your rifle is now Unloaded and Clear.
Loading and Firing Your Rifle To load and fire your rifle: Begin with a rifle that has been verified to be unloaded using the preceding directions. 1. Keep your rifle pointed in a safe direction for the duration of the procedure. 2. Load your magazine with .223 Remington or 5.56x45 NATO cartridges. Place cartridge between the magazines feed lips and push down to seat. 3. Using firm and steady pressure insert the loaded magazine into the magazine well until the magazine catch locks the magazine in place.
Loading and Firing Your Rifle Continued. The following is a description of the sequence for one complete firing cycle; beginning after a cartridge is chambered. Knowing the correct function of your rifle will help you with the diagnosis of any malfunctions or failures to fire. The trigger is pulled releasing the hammer; which strikes the firing pin. The firing pin impacts the primer in the chambered cartridge igniting the primer which ignites the powder.
Zeroing Your Sights U.S. Marine Corps 25-Meter Zeroing Procedure By following the steps below and establishing a zero at 25 meters using a 25-meter sight in target, your rifle sights will be set with a 300meter battlesight. Do not move front sight post at this time; it was set at the factory and should be very close to your zero. The rear sight aperture should also be centered from the factory with the unmarked (large) aperture up.
Zeroing Your Sights Continued. 4. If your shot group is not in the center of the bulls-eye, use the squares on the target sheet to calculate the required “clicks” necessary to move your next shot group into the bulls-eye. Changes in elevation are made by moving the front sight post. The squares are numbered around the edges of the target to equal the number of clicks required to move the shot group to the bull’s-eye. In order to raise your next shot group, rotate the front sight post clockwise.
Disassembly Instructions Before disassembling your rifle please unload and clear your rifle as described in the unloading directions. 1. Reverify your rifle is unloaded and return the bolt and carrier in to battery. 2. If you need to remove the handguards it is easier to do so while the upper is joined to the lower. The handguards can remain in place for all end user maintenance. Place the butt of the rifle on a solid surface.
Disassembly Instructions Continued. 7. The upper and lower receivers are now separated; set the upper receiver aside. 8. Remove the buffer and buffer spring from the lower receiver by depressing the buffer detent. Maintain tension on the buffer face while removing; it is under pressure from the recoil spring. You may need to hold the hammer down to allow the buffer and spring to be removed from receiver extension. 9.
13. Disassembly Instructions Continued. 14. Remove the firing pin retaining pin from the left side of the bolt. You may use a small screwdriver or punch to hook the loop the end of the firing pin retaining pin makes. 15. Tilt bolt face up and remove firing pin from the rear of the bolt carrier. 16. Push bolt into the carrier until it rotates and comes to a stop (in battery position) . 17. Turn cam pin 90° and lift it out from bolt and carrier. 18. Pull bolt forward out of carrier. Set the carrier aside.
Basic Care and Maintenance Proper maintenance will ensure you get the best performance from your firearm. High quality cleaning products will ensure that you get your rifle clean quickly and without damage to your firearm. The Mil-Spec cleaning kit is great for field use, but a good set of cleaning tools and a one-piece cleaning rod will make your task easier at home. There are also many excellent cleaning products available to shooters today. We do not recommend any specific brand, so use what you like.
Upper Maintenance continued. 6. Use a worn out bore brush to clean the outside surface of the protruding gas tube. NOTE: Heat will discolor your gas tube, do not try to remove this discoloration. 7. Wipe the charging handle with a patch dipped in solvent; wipe off solvent with a dry cloth. 8. Inspect the upper assembly for any worn, broken or damaged parts. Replace any faulty parts with quality CMMG replacement parts. 9.
Bolt and Carrier Maintenance WARNING: Never interchange bolts between rifles. 1. Clean all parts and outer surfaces of the bolt carrier assembly with a swab saturated with cleaning fluid. 2. Clean the bolt carrier key with a worn bore brush dipped in cleaning fluid and dry with a pipe cleaner. 3. Remove carbon deposits and dirt from the locking lugs with a cleaning brush dipped in cleaning fluid. 4. Clean the areas behind the bolt rings and under the lip if the extractor. 5.
Lower Maintenance 1. Remove any dirt or debris from the trigger group with a cleaning brush and/or cotton swab dipped in cleaning fluid. 2. Remove powder fouling, corrosion and dirt from the lower receiver with a cleaning brush and/ or cotton swab dipped in cleaning fluid. 3. Use a pipe cleaner to clean the buttstock screw vent hole. 4. Clean the buffer, recoil spring and inside of the lower receiver with a cleaning brush and/or cotton swab dipped in cleaning fluid. 5.
Reassembly Instructions Begin reassembly with the upper receiver. 1. Insert extractor and spring assembly into bolt by pushing extractor assembly down and aligning the pivot hole in the extractor with the hole in bolt and insert extractor pin. If the spring comes loose, seat the large end of spring in the extractor. 2. Stagger the bolt rings to prevent gas loss. 3. Slide bolt assembly into bolt carrier assembly with extractor claw on the carrier's right side. 4.
Reassembly Instructions continued. 12. With the bolt carrier in battery, close ejection port cover. 13. Align the pivot pin holes and push pivot pin in. 14. Pivot the lower receiver towards the upper receiver. When aligned push in take-down pin. 15. If you removed the handguards, place the butt of the rifle on a solid surface. Pull down on the delta ring with even tension on each side. At the same time push one section of the two piece handguard into position. Repeat the process for the remaining half. 16.
Warranty Information CMMG, Inc. will warranty factory built firearms against defects in material or workmanship for the life of the firearm. CMMG, Inc. will pay for warranty repairs at no charge to the customer. All warranty work will be carried out at CMMG. Please supply a copy of the sales invoice and proof of purchase. The use of Wolf ammunition or other steel case ammunition will void warranty.
Ammunition Warning With the growing popularity of the AR-15/M16 family of rifles the demand for ammunition has risen sharply. Unfortunately, this has made quality ammunition hard to find. CMMG recommends using only domestic, commercially manufactured ammunition or high quality surplus NATO specification ammunition. Using any reloaded ammunition, any steel cased ammunition or Wolf Ammunition VOIDS your Limited Lifetime Warranty.
Ammunition Warning Continued. • • • Improperly seated primers. The primer should be flush with the base of the case with no visible damage to the primer cup. Some ammunition may have a colored sealant around the primer. Corroded cartridges. Any amount of metal that is corroded and eaten away. Do not fire cartridges exposed to extreme heat (135 F°) until they have cooled. Warning Signs Not all defective ammunition has visible traits to distinguish it from good ammunition.
Troubleshooting Selector will not engage “SAFE”. UNLOAD Rifle First. Inspect for Resolution Fire control group is not cocked. Fire control must be cocked. Primer in fire control group. Remove and discard. Selector frozen on “FIRE”. Disassemble, Clean, Lubricate and assemble correctly. Too many cartridges in magazine. Remove excess cartridges. Magazine fails to lock into magazine well. Inspect for Resolution Dirty or corroded magazine catch. Disassemble, Clean, Lubricate and assemble correctly.
Troubleshooting Failure to FIRE UNLOAD Rifle First. Inspect for Resolution Selector on “Safe”. Move Selector to “Fire” Selector frozen on “Safe”. Disassemble, Clean, Lubricate and assemble correctly Excess fouling or carbon on firing pin or in firing pin recess. Disassemble, Clean, Lubricate and assemble correctly Excess oil in firing pin recess. Remove excess oil with pipe cleaner Improper assembly of firing pin.
Troubleshooting Bolt Fails to Lock Open on Last Round Inspect for Resolution Dirt, corrosion, or carbon buildup in bolt and carrier. Clean. Dirt, corrosion, or carbon buildup in barrel locking lugs Clean. Ejector frozen Clean and oil. Defective magazine Replace. Dirty or corroded bolt catch Clean or replace. Burred or broken bolt Contact a qualified gunsmith or CMMG Install correct spring. Carbine spring should be 36 coils versus 44 for the A1 or A2 rifle. See section on short stroking.
Troubleshooting Cartridge Jammed in Action Cartridge jammed between bolt and magazine or feed ramps. Bolt Over Base Failure 1. Remove magazine Double feed. 3. With the rifle positioned muzzle up; strike the buttstock on the ground. 2. Pull back and hold charging handle to the rear. 4. When the bolt is free of the cartridge lock the bolt open with the bolt catch. 5. Remove and discard damaged casings or cartridges. 6. Inspect the rifle for damage. 1.
Contact Us CMMG Inc. P.O. Box 369 Fayette, MO. 65248 sales@cmmginc.com nfa@cmmginc.com techsupport@cmmginc.com Phone (660) 248-2293 FAX (660) 248-2290 Visit our website www.cmmginc.com This manual was printed from a PDF and was not included with an original CMMG Rifle. If you have any doubts as to the authenticity of the any rifle that came with this manual please contact us.
