Mossberg Patriot Carbine 450 Bushmaster Matte Blue/Black Bolt Action Rifle - 18in - Mossberg Patriot Carbine bolt-actions are packed with features, and are offered in eight calibers and a variety of suppressor-ready barrel lengths. These compact, easy-to-handle rifles make a great choice for multi-game, multi-season hunting. Threaded Barrel: 11/16 x 24 ; Drop Box Magazine; Threaded/Medium Bull Barrels are muzzlebrake/supressor-ready; Recessed match barrel crown; Top-mounted picatinny rail; Spiral fluted bolt and oversized bolt handle; Patented LBA user adjustable trigger (2lbs - 7lbs);