This skeletonized combo pairs an aluminum Picatinny foregrip with a matching pistol grip for AR-15 and .308 lowers. It gives you better weapon control without adding much weight. Skeletonized foregrip: made from aircraft-grade aluminum and designed to mount on an under-barrel Picatinny rail. Skeletonized pistol grip: fits .223/5.56 and .308 lowers. It's 6061-T6 aluminum, and it reuses your existing grip bolt. The mounting bolt is not included. Features: Skeletonized foregrip for under-barrel Picatinny rails Skeletonized pistol-style rear grip for .223/5.56 and .308 lowers 6061-T6 aluminum, black anodized Machined and anodized in the USA Pistol grip specs: Weight: 3.6 oz Height: 4" Length: 2-1/4" Width: 7/8" Before you install: keep your current grip bolt and lock washer, since the grip reuses them. Be careful with the safety selector detent and spring when you swap the grip, because they sit under the grip and are easy to lose. Function-check the safety with an unloaded rifle after installation.