The Primary Weapons Systems MK111 Mod 1-M Upper 7.62x39 11.85 LS FRC is a purpose-built complete upper receiver that blends PWS’s long-stroke piston engineering with a compact, maneuverable 11.85 inch barrel. Built on a fully forged 7075-T651 aluminum receiver with an anodized finish, it features a free-float PWS M-LOK 11.05 inch handguard, PWS Triad 30 muzzle device, and an FRC 2-port compensator to help control recoil and muzzle rise while maintaining smooth, reliable cycling.
This upper is chambered in 7.62x39mm and optimized for practical accuracy, extended range sessions, and dependable performance with a wide variety of ammunition. The carbine-length long-stroke piston gas system, forward assist integration, and Radian Raptor ambidextrous charging handle make it a strong choice for range use, training, and field applications where reliability and ease of handling matter. Shooters looking to upgrade an existing lower with a compact, piston-driven 7.62x39 solution will appreciate the thoughtful design and proven craftsmanship that Primary Weapons Systems is known for.
Key Features:
- Manufacturer: Primary Weapons Systems
- Model: MK111 Mod 1-M Upper
- Caliber: 7.62x39mm
- Barrel Length: 11.85 in
- Gas System Type: Long-stroke piston, carbine length
- Handguard: 11.05 in free-float PWS M-LOK
- Muzzle Device: PWS Triad 30 with FRC 2-port compensator
- Receiver Material: Forged 7075-T651 aluminum
- Charging Handle: Radian Raptor ambidextrous
- Finish: Anodized, LS FRC
| __Ambidextrous | Yes |
| __Material | 7075-T6 Aluminum, Steel |
| __Firearm Type | Rifle, SBR, Tactical Pistol |
| __Capacity | NA |
| __Caliber | 7.62X39 |
| __Model | MK111 MOD 1-M |
| __Barrel Length | NA |
| __Optic Footprint | NA |
| __Action | NA |
