The R1 Endurance's action is based on Benelli's innovative M4 military shotgun used by the United States Marine Corps. It incorporates the auto-regulating, gas-operated (A.R.G.O.) system adapted for use with centerfire rifle cartridges paired with a three-lug rotary bolt. The gas cylinder is positioned to allow for a short operating rod, resulting in less felt recoil than other rifles. The free-floating, cryogenically treated barrel is mated to a sturdy steel upper receiver to offer outstanding accuracy and a secure platform for mounting optics. The lower receiver is anodized aluminum to reduce weight.
