B&T Buffer Tube Adapter GHM9/45 (BT-450228) is an adapter that allows mounting a standard AR-15/M4 type buffer tube on B&T GHM9 and GHM45 submachine guns (9 mm and .45 ACP).
Thanks to it, you can install any telescoping stock, brace (e.g., SB Tactical, Tailhook), or classic AR-15 stock, significantly improving ergonomics and weapon control.
The adapter is made of high-quality 7075 aluminum (anodized), fits Gen1 and Gen2 GHM models, and installation is simple, requiring only the included hardware.