Luth-AR's MBA-1 Rifle Buttstock is designed to mount to an AR-15 or AR-10 Rifle Length A2 Buffer Tube. It is fully ambidextrous and can be comfortably used shooting off either shoulder. The cheek piece comes pre-installed for right handed shooters but can be installed for the left handed shooter. The cheek piece not only moves up and down, it also moves back and forth on the stock, while the stock's length of pull is adjustable via a convenient thumbscrew. This fixed stock fits all .223 AR style rifles. It is a constructed of super strong glass filled nylon and incorporates a receiver end plate in the design. It is easy to replace and quick to install. This Assembly Kit comes with everything needed to install the MBA-1 Stock to an AR-15 lower receiver, including an A2 Buffer Tube, Rifle Recoil Buffer and Recoil Buffer Spring.