Mil-spec A2 rifle-length receiver extension for fixed rifle stocks, a rifle buffer, and a rifle spring.
The KAK Industry A2 Standard Rifle Buffer Tube is the rifle-length receiver extension that fixed A1/A2-pattern stocks mount on. It weighs 3.3 ounces, is finished in black hard-coat anodize, and takes a rifle-length buffer and rifle action spring.
It is not a carbine tube. Collapsible carbine stocks, carbine buffers, and carbine springs do not fit it; it pairs with a rifle stock such as an A2 or the Magpul MOE Rifle Stock. A rifle tube needs no castle nut or end plate: the stock captures the takedown detent spring and is held by its rear stock screw.
Add the KAK Industry A2 Standard Rifle Buffer Tube to your build and see how it enhances your platform.