M4 LINE
1 Index USE • MAINTENANCE ................................................................ 1 Criteria for gun storage, cleaning and maintenance .................. 16 Basic safety rule ........................................................................ 2 Shotgun assembly ...................................................................... 17 Introduction .............................................................................. 4 Troubleshooting .........................................
2 WARNING: PLEASE READ THIS MANUAL BEFORE HANDLING YOUR FIREARM. WARNING: FIREARMS CAN BE DANGEROUS AND CAN POTENTIALLY CAUSE SERIOUS INJURY, DAMAGE TO PROPERTY OR DEATH, IF HANDLED IMPROPERLY. THE FOLLOWING SAFETY RULES ARE AN IMPORTANT REMINDER THAT FIREARM SAFETY IS YOUR RESPONSIBILITY. 1. NEVER POINT A FIREARM AT SOMETHING THAT IS NOT SAFE TO SHOOT. Never let the muzzle of a firearm point at any part of your body or at another person. This is especially important when loading or unloading the firearm.
3 Make sure the chamber and barrel are free from any obstruction, like a bullet blocked inside the barrel due to defective or improper ammunition. 7. USE PROPER AMMUNITION. Only use factory-loaded, new ammunition manufactured to industry specifications: CIP (Europe and elsewhere), SAAMI® (U.S.A.). Be certain that each round you use is in the proper caliber or gauge and type for the particular firearm.
4 Introduction Corrosion warranty Benelli Armi S.p.A. is proud to introduce the new line of semi-automatic M4 shotguns, a result of painstaking work at Benelli’s Research and Development Center and of Benelli’s extensive experience in precision engineering and technical know-how. Benelli products are manufactured using highquality light alloys and steel treated according to the best commercial standards.
5 Operation Before attempting any work on your M4 make sure that the chamber and the magazine of your shotgun are unloaded. (See the instructions on loading and unloading). The M4 shotgun is a semi-automatic, tubular magazine fed weapon chambered for the 12 gauge (18.4 mm) shotshell cartridge. The operating system employed in this weapon is the improved ARGO (Auto-Regulating Gas Operated) Twin (two gas pistons/cylinders/ports) System with rotating bolt head with dual locking lugs.
6 Assembly (from packaged gun) Components of the package: stock-receiver-bolt barrel-breech half-fore-end cocking lever 1 4 2 5 3 6 WARNING: please remember to remove the plastic barrel sheath before using the firearm (fig. 1). Assembly procedure 1) Insert completely the cocking lever into the breech bolt unit (fig. 2). 2) Unscrew the fore-end cap (fig. 3).
7 4) Take the barrel-breech unit, place the barrel on the magazine tube and slide it down toward the receiver (fig. 6). 5) Insert the breech extension on the receiver, ensuring that the magazine tube enters the opening of the barrel guide ring (fig. 7). Use Before attempting any work on your M4 make sure that the chamber and the magazine of your shotgun are unloaded. (See the instructions on loading and unloading). 6) Position the twin forearms together (fig.
8 Gun safety catch Loading Press the safety button on the trigger guard until its red ring, indicating firing position, is no longer visible (figs. 12-13). Before attempting any work on your M4 make sure that the chamber and the magazine of your shotgun are unloaded. (See the instructions on loading and unloading). Telescoping stock adjustment M4 is fitted with a two position telescoping stock: short/extended Starting with the telescoping stock extended and to shorten it (fig.
9 1) The red dot on the cartridge drop lever (indicating that the hammer is cocked) (fig. 15) must be clearly visible. To bring lever to this position, press the carrier button and open the bolt by hand, then bring it to close position again (fig. 16). 2) With the bolt closed and the hammer cocked, reverse the gun pointing the barrel downwards. 3) Insert a cartridge into the magazine (fig. 17): push it until it is retained by the carrier latch which engages automatically (fig. 18).
10 B) indirect procedure: Cartridge replacement 1) Open the bolt and hold it in this position through the cocking lever. Press in the same time the cartridge drop lever, so that the first cartridge in the magazine drops into the carrier (fig. 21).
11 Unloading Gun stripping (This operation must be carried out with the gun safety catch engaged - see “Gun safety catch” and barrel pointed in a safe direction) Before attempting any work on your M4 make sure that the chamber and the magazine of your shotgun are unloaded. (See the instructions on loading and unloading). To unload the shotgun, proceed as follows: 1) Open the bolt: the cartridge in the chamber will be extracted and ejected (fig. 23).
12 2) Move the cartridge drop lever (fig. 27). 3) Unscrew the fore-end cap (fig. 28). 4) Remove the barrel along the magazine tube (fig. 29). 5) Slide down the twin forearms (fig. 30). 6) Grip the barrel and move it forward to remove the whole barrel-breech unit from the receiver (figs. 31-32).
13 7) Hold the cocking lever firmly and press the carrier button (fig. 33), allowing the bolt to move a little way forward until it stops (fig. 34). 8) Twist and pull off the cocking lever (fig. 35). 9) Remove the bolt assembly from the receiver, pulling it forward (fig. 36). 10) Remove the firing pin, ensuring that the firing pin and the relative return spring remain inside the bolt (fig. 37). 33 36 34 37 35 38 11) Remove the firing pin and the firing pin spring (fig. 38).
14 12) Remove the locking head pin from its seat (fig. 39). 13) Remove the locking head (fig. 40). 14) Pull out the trigger guard pin using the cocking lever tip (fig. 41). 15) Complete the pulling out of the trigger guard pin using the cocking lever end (fig. 42-43). 16) Press the carrier button and extract the trigger guard assembly towards the front (fig. 44).
15 17) Starting with the telescoping stock extended: b c a a) Depress locking button. b) Rotate the stock clockwise (rear view). c) Push it forward till the line marked on the recoil tube (fig. 45). d) Rotate the stock counter-clockwise. e) Pull it to the rear off the recoil tube (figs. 46-47). 45 48 18) Take the receiver with a hand and with the other unscrew the pistol grip in a counterclockwise direction until free (fig. 48). d 19) Using the cocking lever, remove the gas cylinder plugs (fig. 49).
16 Criteria for gun storage, cleaning and maintenance All metals used in the Benelli product line (aluminium alloys and steel) are treated according to the most advanced standards available on the market today. In order to maintain your gun in excellent working conditions, you will need to follow these simple maintenance procedures. Packing Benelli supplies the gun cleaned and lubricated with a protective oil to guarantee maintenance over time.
17 Cleaning must be repeated until all traces and lines of dirt have been completely removed. At the end of each cleaning cycle, apply a homogenous layer of CLP (Cleaning, Lubricant, Protective) type oil to all metal parts. IMPORTANT: the inside of the cylinder and gas collector pistons do not require lubricating. We recommend using the Benelli gun oil and cleaning set (fig. 51) (supplied with the gun).
18 4) Lift the stock-receiver group as far as the receiver and press the carrier button, insert the complete trigger group - with cocked hammer - on the receiver in slightly forward position, then draw it back until engaged in the rear of the receiver itself (fig. 57). 5) Block the trigger guard assembly using the trigger guard pin (fig. 58). 6) Insert the bolt head into the front of the bolt carrier (the hole on its leg must be aligned with the slot of the bolt) (fig. 59).
19 WARNING: if firing pin and relative locking pin have been correctly assembled, at the end of the operation the firing pin will appear as described under fig. 63. NOTE: do not use any tools to insert the firing pin into the bolt carrier: use fingers only. 10) Hold the stock receiver almost horizontally and insert the bolt assembly in its guide on the receiver (fig. 64). 63 66 64 67 65 68 11) Insert completely the cocking lever into the bolt group (fig. 65).
20 Troubleshooting Choice of ammunition ACCESSORIES AND ADJUSTMENTS Before attempting any work on your M4 make sure that the chamber and the magazine of your shotgun are unloaded. (See the instructions on loading and unloading). Correct functioning of the shotgun is only guaranteed with cartridges of a maximum length of 58 mm (2” 3/4 - 70 mm chamber) or 66 mm (3” - 76 mm chamber). The shotgun accepts cartridges with rolled turnover or crimped closures, and with lead or steel shot.
21 Internal choke (when supplied) Before attempting any work on your M4 make sure that the chamber and the magazine of your shotgun are unloaded. (See the instructions on loading and unloading). WARNING: before using the shotgun, make sure that the barrel has a choke correctly installed. 69 72 70 73 71 74 WARNING: the internal choke correctly mounted must not stick out of the barrel’s muzzle. Use only the Benelli internal chokes with a length which correctly fits the barrel.
22 4) Finish the assembly of the choke by screwing it firmly using the choke wrench (fig. 75). Wear eye protection when disassembling this gun! NOTE: before re-using the shotgun, make sure that the choke wrench has been removed from the barrel’s muzzle. If the magazine spring escape at high velocity severe eye injury or other injuries can occur. Before the shotgun is put away, cleaning the internal choke and relative barrel thread is recommended.
23 Spare Parts To order spare parts you must specify the gauge, the model and the serial number of your shotgun. Part numbers here listed refer to respective drawings.
24 Drawing 1 1 2 3 6 5 4 7 8 9 10 25 24 23 22 21 20 11 12 13 14 15 16 19 18 17
25 Pos. No. Code Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 001J 023J 277J 045J 005B 009J 011J 021J 022J 004J 002J 003J 019J 020J 018J 017J 016J 076J 010J 013J 012J 014J 077J 008J Trigger guard assy Pin Spring Disconnector plunger Disconnector Trigger Spring Spring Pin Spring Hammer Cap Stop tooth Pin Spring Carrier Bushing Cartridge drop lever Trigger pin Safety button Retaining pin Trigger guard Spring Plunger Pos. No.
26 Drawing 2 1 2 3 16 4 15 5 6 7 14 10 9 13 12 8 11
27 Pos. No. Code Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 024J 026J 027J 029J 039J 038J 040A 165J 033J 034J 035J 031J 030J 028J 037J 025J Bolt assy Bolt, partial Link Link pin Pin Spring Pin Locking head assy Spring Extractor Pin Pin Bolt handle Retaining pin Spring Firing pin Pos. No.
28 Drawing 3 1 2 3 4 5 6 7 14 8 15 16 17 9 21 10 18 11 20 13 19 12 22 23 24 25 26 33 37 34 38 35 32 27 31 28 29 30 39 36
29 Pos. No. Code Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 166J 052J 050J 054J 055W 049J 183J 075J 268J 267J 266J 015J 127J 258J 253J 255J 254J 257J 126J 256J 259J 261J 262J 260J Recoil spring tube assy Circlip Plug Spring Pin Recoil spring tube Spring ring Ring nut Spring Retaining spacer Circlip Pin Rear sight assy Spring Ring Screw Support Pin Protection guard Screw Spring Screw Washer Accessory mounting rail Pos. No.
30 4 Drawing 1 25 24 23 22 21 20 2 19 18 17 13 16 3 15 14 1 12 11 10 9 8 7 6 5 4
31 Pos. No. Code Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 070J 110J 111J 213J 074J 073J 113J 133J 067J 135J 134J 136J 276J 275J 274J 273J 272J 271J 270J 269J 172J 047J 168J 045J Fore-end (left/right) Front sight Front sight protection guard Internal choke Ball Spring Self-locking nut Sling plate retainer Sling attachment plate Spring washer Washer Spring ring Gas plug assy Spacer Spring Gas plug cap Pin Gas plug O-Ring Gas piston Rivet Rivet Ejector frame Pin Pos. No.
32 Drawing 5A 1 2 3 4 5 6 7 8 9 10 15 10 14 11 13 12
33 Pos. No. Code Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 265J 129J 061C 149J 262J 264J 106J 107J 108J 080J 117J 079J 078J 075J 083J Telescoping stock assy Screw Rubber butt plate Cover Washer Screw Retaining pin Spring Pin Pin Pistol grip handle assy Plate retainer Plate Ring nut Rubber grip Pos. No.
34 Drawing 5B 2 3 1 4 2 3 10 4 5 6 7 8 11 5 6 7 8 9 2
35 Pos. No. Code Description 1 2 3 4 5 6 7 8 9 10 11 161J 062J 061J 053J 278J 279J 280J 063J 078C 160J 083C Stock assy Self-threaded screw Rubber butt plate Nut Plate Spring Pin Swing swivel plate Plug Pistol-grip stock assy Rubber grip Pos. No.
