8-inch Armbar, Brace Adapter, not assembled Lightweight and Rigid! Modular Design - Brace/Stock with many mounting options Integrated QD Sling Socket 8"" Length 7075 T6 Aluminum Hard-Coat Anodized Optional Folding Buttplate The AB-BA adapter allows you to install braces like the TailHook from Gear Head Works Anti-Rotational design 7075 T6 Aluminum Type 3 Hard-coat Anodize Arm Bar-Brace Adapter Socket Head Screw Arm Bar-Brace Adapter Anti-Rotation Pin SM adapters utilize the factory rear trunnions and eliminate the need for additional adapters or folding mechs. This version of the SM stock/bra Mfg: Jmac Customs