The MK2 MOD 1-M, revamped for 2018, features the PWS long stroke piston system originally designed for the AR-15 platform. What makes a short gun run, makes a long gun accurate- that being said, the MK2 is among the most reliable and accurate in its category. The MK2 line features a free-float MLOK handguard with fully forged upper and lower receivers. Lightening cuts and an eliminated forward assist make the MK2 MOD 1-M line a lightweight yet solid feeling firearm. Accuracy, smooth operation and reliability make the MK2 MOD 1-M line a necessity for those looking to expand their long-stroke piston system firearm collections.