Armaspec Carbine Buffer Tube Kit, Includes End Plate and Castle Nut, AR-15, Anodized Finish, Black ARM621-C Founded in 2013" Armaspec is a U.S. manufacturer of firearm accessories for the AR" Glock" AK" 1911" and other platforms. Armaspec focus's on producing quality" innovative products that offer a tactical advantage" at a fair price" all made in the U.S. Their product line includes magwell grips" charging handles" parts kits" selectors" stocks" recoil systems" and other accessories for the firearms industry.