Primary Weapons Systems MK111 Mod-1M Upper, Fits AR15, 223 Wylde, 11.85″ Barrel, Black Color, Anodized Finish, Primary Weapons M-Lok 6.9″ Handguard

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 fully forged receivers, the MK1 MOD 1-M is a no-nonsense tool for when you need a high value option that is relentless and unstoppable.. Barrel Length. :. 11.85″. Caliber. :. 223 Wylde. Color. :. Black. Finish. :. Anodized. Fit. :. AR-15. Manufacturer Part #. :. MK1-M1U-223-11. Model. :. MK1. Subcategory. :. Complete Upper Receivers. Type. :. Upper