This is the right component if want to mount an M4 type buffer style stock to your M-11 SMG and a NO SHOW adapter. This steel adapter slides into your existing wire stock slots and is secured by a button head bolt and a threaded internal block. Bolt, billet block, Allen head bolt and 6 position rear stock all provided. The Rear of the adapter is flat with an AR Buffer Tube Threaded and includes an AR M4 style stock.(gun and other accessories sold separately) Installation instructions. Please call with questions.