For sale is a brand new BRT Optimum Barrel in 5.56. 14” long. 5r rifling with mid-length gas system. I am also selling a matching BRT 5.56 bolt. Aero gas block and gas tube. All parts are new. With this whole package is a Dead Air Key-Mount flash hider which gives you enough length to pin and weld back to the legal 16”. Not really wanting to break it up all up would prefer to sell as a “barrel assembly”. $385+shipping