Luth-AR MBA-2 Skullaton Fixed Stock, Fits AR-15 & AR-10 Rifle Length A2 Buffer Tube, Black MBA-2 Luth-AR's MBA-2 Fixed Rifle Stock is designed to mount to an AR-15 or AR-10 Rifle Length A2 Buffer Tube. The MBA-2 features multiple sling attachment points" and is a simpler version of the modular MBA-1 for shooters who do not require the adjustability. It is constructed of super strong glass filled nylon and incorporates a receiver end plate in the design. This fixed stock fits all .223 and most .308 AR style rifles. Includes A2 buffer tube screw (buffer tube not included).