Strike Industries' Carbine length Pistol receiver extension is designed to be a serious piece of hardware. Machined from 7075-T6 aluminum construction, the Carpre offers much greater strength than your standard 6061 tubes. The pistol receiver extension features a supported, anti-rotation buffer retaining plunger, and a convenient sling swivel that is machined into the back to facilitate push-pull operation. This Slick Version features an all-around smooth profile and has a blue anodized finish.