Reptilia’s RECC-E Stock is a perfect upgrade for any AR15, M4, or SR15 style rifle. It features a modular design that allows the use of a standard AR15 carbine buffer system, but this can be converted to an A5/SR25 carbine buffer system by replacing the receiver extension (buffer tube) and forward portion of the stock. Other features of the RECC-E include a constant cheek weld to promote proper alignment between the shooter’s eye and a mounted optic, as well as a rubber recoil pad for shooter comfort. In addition, the RECC-E stock is made from impact-modified glass filled nylon polymer and 7075-T6 Aluminum to give the stock a remarkably lightweight of just 12 ounces. Features of the Reptilia RECC-E Stock: Can be used with standard AR15 carbine buffer systems or converted to an A5/SR25 carbine buffer systemConstant cheek weldRubber recoil padImpact-modified glass filled nylon polymer and 7075-T6 Aluminum construction Reptilia RECC-E Black Carbine Stock for AR15/M16 100-141