This enhanced padded carbine length buffer tube cannot accept an adjustable stock. It features anti-tilt, anti-rotation tabs. It comes with the foam cover as shown in the photo. This buffer tube should only be used on rifles that have a sporting stock installed because this style buffer tube cannot accept a stock. As with all of our carbine length buffer tubes, we recommend our ratcheting castle nut for maximum reliability. Use only a carbine length spring and buffer as appropriate for your gun.