Fab Defense GL-Core Impact Features The Fab Defense GL-Core Impact buttstock is built around a patented shock absorbing mechanism with three adjustable recoil settings letting the shooter tune the stock s response to match their caliber and shooting style. Whether running a lightweight 5.56 carbine or a harder recoiling setup the mechanism is engineered to minimize felt recoil by up to 50 percent which directly translates into faster more controlled follow-up shots. Reducing the shock transmitted to the shoulder also cuts down on shooter fatigue over long range sessions or extended strings of fire. Interchangeable buffer tube adaptors allow the stock to mount on either mil-spec or commercial tubes making it compatible with a wide range of existing AR-15 and M4 builds. An ergonomically shaped rubberized butt-pad cushions the point of shoulder contact improving comfort while reinforcing the recoil-reducing design of the stock body. The synthetic stock construction keeps overall weight manageable while standing up to repeated adjustment and field use. An inverted positioning lever is designed so the stock will not open accidentally during transport or handling adding a margin of safety many standard adjustable stocks lack. Installation is straightforward on any AR-15 or M4 pattern lower already fitted with a compatible buffer tube making this a simple drop-in upgrade for shooters chasing better control and reduced recoil at the range or in competition. Fab Defense GL-Core Impact Specifications Manufacturer: Fab Defense Model: GL-Core Impact Type: Adjustable Buttstock Compatible Hosts: AR-15 / M4 Color: Black Material: Synthetic Butt Pad: Rubber Tube Included: No Available At: GrabAGun