The MK1 MOD 1-M line revamped for 2018 features the PWS long stroke piston system. Internally this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard forward assist controls and a more true to mil-spec design the MK1 MOD 1-M line is a go-to for not only civilians but also Law Enforcement. With the fully forged upper and lower receivers the MK1 MOD 1-M is a no-nonsense tool for when you need a high value option that is relentless and unstoppable. - The MK116 MOD 1-M is one of the most popular firearms PWS manufactures. Being a go-to for Law Enforcement communities looking for non-NFA items this rifle can be seen in-use by over 85 LE communities in the United States. - MK116 MOD 1-M Specs: - Caliber: .223 - Weight: 4 lb. 11 oz. - Length: 25 - Piston System: Mid-length - Velocity: 2980 ft/sec - MK116 MOD 1-M Features: - PWS long stroke piston operating system - 3-setting adjustable gas system - Forged upper receiver - Included forward assist - FSC556 compensator - MLOK free float handguard - 1:8 barrel twist rat - Radian Raptor Charging Handle - MK116 MOD 1-M Includes: - Rifle service tool for gas adjustment