This Bushmaster Modular Pistol Grip Kit has an unparalleled combination of fit, form, function and it is textured for sure-grip. It will fit all M16, M4, AR-15, and HK416 variants made to mil-spec. You have a choice of any combination of the three interchangeable front, and three interchangeable back straps so you can have a truly custom fit to your rifle. It covers the receiver gap that causes discomfort during sustained usage and it has a watertight storage compartment, with foam block to eliminate noise from rattle
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