USMachinegun.com brand USED “Modular Machined Rear Stock. It offers a solid stock design and with the adapter weighs just over 1 lb. It measures 8.75″ from the rear of the receiver. Finished in jet black oxide with a machined slot near the top at the rear for a sling or attachment. Replaces the factory push button OEM parts with an adapter and a threaded, machined inside block. Allen wrench included. Fits M-11 SMG only.” (verbiage from usmachinegun.com website. There are some light scratches and scruff marks will a little rust on the screws, but it is still perfect in functionality. This stock sells for $148.00 new.