If you are looking for new tactical rear folding stock set up for your M-11 Cobray Semi Auto 9mm, this is for you! This black aluminum stock is only 7-1/4" long and lightweight. Includes an extension tube, sling swivel, foam over tube, and a 1/2" recoil pad stock adapter and folding adapter. The sling swivel can be relocated to any of four different locations. (photos shows it on left mid side) This set up will only fit all Cobray M-11 Semi Auto 9mm guns. Includes rear stock adapter, folding adapter, bolt and ACE rear stock, ONLY. (gun & other parts sold separately) NFA rules apply, Addition of this item may require additional paperwork to be filed with the ATF, check with your local dealers.