The SB Tactical Buffer Tube Folding Adapter (BTFA) is designed for use with all buffer tube receptacles, but NOT compatible with AR platforms. The SB Tactical Buffer Tube Folding Adapter features a low-profile design, reversible, lockable, made from 6061 Type III anodized aluminum and is designed for use with all buffer tube receptacles other than AR platforms. Features Low-profile design Reversible for right or left side-folding Locks in both the open and closed positions Made of 6061 type III anodized aluminum Designed for use with all buffer tube receptacles NOT compatible with AR platforms Specifications Weight: 3.4 oz OAL: 1.5" (adds only 1.1" when installed)