Purpose built for 3-Gun and practical rifle competition, the M153GN13's are ready to dominate, right out-of-the-box. A Timney 4-lb., single-stage trigger and Ergo wide grip come standard. The light weight MBA-1 buttstock features an adjustable cheek piece and length-of-pull. The factory ambidextrous safety and Raptor charging handle provide ease of operation for all types of shooters. This rifle is highly customizable, with an adjustable gasblock and tunable muzzle brake to give the user the opportunity to tune the rifle for specific purpose or ammunition. The proprietary Armalite muzzle brake is pinned and welded to create an overall length of 16″, meaning this rifle does not fall under NFA requirements!