The M4 comes standard with a 47-cm barrel and a 7-shot magazine tube. The special telescopic stock lets you shorten the length of the firearm by 13 cm by pushing a button. Versatility is enhanced by its interchangeable stocks: fixed stock and pistol grip stock, both made of technopolymer reinforced with glass fibres, can be replaced with no need for tools. The butt plate at the end of the stock helps additionally reduce the modest recoil perception of the shotgun. To fully benefit of its accuracy, the M4 is equipped with a fixed blade front sight protected by side wings and an adjustable diopter. The sights can be equipped with luminescent markers for shooting in poor light.
76 mm Magnum
BARRELS AND CHOKES
SB - Interchangeable choke - Scope mount rail 47 cm
Ergal, mat black anodised, anti-glare
STOCK AND FORE-END
Aluminium alloy, telescopic stock, also available with Pistol Grip and standard (hunting style) stock
STOCK LENGTH TRIGGER MEASURED / DEVIATION
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 and telescopic stock
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.