M4 stands out as one of the best shotguns available on the market today in terms of performance, choice of materials and reliability, all guaranteed benefits of Benelli products. It comes with the handy pistol grip stock that allows for quick, ready action. The barrel is completely chromed and phosphated inside. M4 is the first Benelli semi-automatic with an ingenious, innovative self adjusting gas system patented by Benelli.
76 mm Magnum
BARRELS AND CHOKES
SB - Interchangeable choke 47 cm
Ergal, black anodised with mat finish
STOCK AND FORE-END
STOCK LENGTH TRIGGER MEASURED / DEVIATION
360 mm Without cast
7 rounds 12/70 mm, 6 rounds 12/76 mm; 2-round limiter available for the Italian market
approx. 3,800 g with 47 cm barrel
Drop change kit, user and spare parts handbook, Ben oil.
Simple, robust, original, clever: these are the peculiarities of the project underlying the A.R.G.O. patent: : A.R.G.O. stands for Auto Regulating Gas Operated. Made of a self adjusting gas system containing a short-stroke piston, A.R.G.O. is placed under the barrel, near the chamber, so as to exploit the hottest gases at a higher pressure. The gases tapped from the barrel expand (in the self adjusting gas system) and rapidly accelerate the stroke of the piston, which simultaneously hits the bolt follower pin and pushes it hard to enough to make it retract. It is self-regulating because the gas inlet valve functions as a regulating valve that expels excess gas during firing. The greater the volume of gas flowing from the barrel, the faster the pin valve opens and allows it to exit, thus decreasing the pressure inside. Self-adjusting, A.R.G.O. guarantees shooting precision, reliability, durability and confirms the technological excellence of Benelli. An operating mechanism that is also appreciated and approved by the Marines.