The Primary Weapons Systems MK216 MOD 1-M is a piston-driven .308 Winchester semi-automatic rifle with PWS's long-stroke piston system designed for reliable function in suppressed configurations. PWS' piston design reduces the back-pressure pulse that causes issues in direct-impingement rifles when suppressed, making the MK216 an ideal platform for suppressed hog hunting. The 16-inch barrel with 5/8x24 threaded muzzle and PWS compensator delivers .308 performance in a compact rifle-length package. Type: Rifle Action: Semi-Automatic Caliber: .308 Winchester Capacity: 20 Year introduced: 2014, USA Weight: 118 oz Overall length: 36" Status: Active Intended use: hunting, hog_hunting, tactical, suppressor_host