Primary Weapons Systems MK1 MOD 1-M Upper Receiver 300BLK 9.75"

The MK1 MOD 1-M line 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.

Features :

• "9.75" 300BLK Barrel"
• Barrel Twist Rate 1:8
• Muzzle Velocity 2264 fps
• PWS Triad 30 Muzzle Device
• PWS Proprietary Piston Upper, T6 7075 Forged, Anodized
• "PWS M-Lok 6.9" Handguard"
• Radian Raptor Ambidextrous Charging Handle