Luth-AR MBA-1 Stock With Buffer Assembly, A2 Extension Tube, Standard Buffer, .308 Buffer Spring, Adjustable Cheek Piece and Length of Pull, Black MBA-1K308 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 most .308 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 a 308/7.62 AR-10 lower receiver" including an A2 Buffer Tube" 308 Rifle Recoil Buffer and Recoil Buffer Spring.