Purpose built for 3-gun and practical rifle competition, the Armalite M-15 Competition M153GN18 is ready to dominate right out of the box. The light weight MBA-1 buttstock features an adjustable cheek piece and length-of-pull. This rifle is highly customizable, with an adjusting gas block and tunable muzzle brake to give the user the opportunity to tune the rifle for a specific purpose or ammunition.FeaturesAdjustable Luth-AR MBA-1 StockOptics ReadyArmalite Tunable Brake