Magpul

-Replacement pistol-grip for some AR10-type weapons*-Removable and replaceable front and rear straps for a custom fit over multiple hand sizes-Improved ergonomics and positive anti-slip texture on both sides and rear back-strap-Removable inner core holds a reusable 1/2 fl. oz. lubrication bottle (oil not included)-Custom waterproof storage of batteries (AA/AAA or CR123A) or spare bolt/firing pin (AR15/M4) isavailable with optional Storage Cores-Each kit includes three backstrap sizes (S,M,L), two frontstraps (A1 and A2 style), lubrication bottle core,and dual-drive mounting screw*Note: This TYPE 2 Kit uses taller backstraps for optimized fit with certain 7.62x51 receivers such as the Armalite AR-10A/B/T, DPMS LR308, KAC SR25, LaRue OBR, LMT .308 MWS, Palmetto PA10, and S&W M&P10. Some 7.62x51 variants such as the Aero Precision M5 308, CMMG Mk3, CORE Rifle Systems CORE30, HK 417/MR762A1, LWRCI REPR, Mega Arms MATEN, POF P-308, Ruger SR-762, and SIG716 will require the TYPE 1 Kit. In general, the TYPE 1 Kit will fit most all 7.62x51 AR lower receivers but there may or may not be a gap between the backstrap's 'beavertail' and the receiver. This gap is purely aesthetic and will not affect function.