This is a Luth-AR Stock known as the MBA-2K308, model MBA-2F.
Luth-AR's MBA-2 Skullaton Fixed Rifle Stock is made to mount to an AR-15 & AR-10 rifle length A2 Round Standard Buffer Tube. It is constructed of super strong glass filled nylon and incorporates a castle nut and lock ring in the design. It fits all .223 and most .308 AR style rifles. It is ergonomic" easy to replace and easy to install.
Features:
Comes with A2 Buttstock screw to connect to A2 standard buffer tube
