The Primary Weapons PWS MK1-M2U-6ARC18NC MK118 Mod 2-M Upper 6ARC 18 pairs a precision 6mm ARC chamber with an 18-inch threaded barrel to deliver a refined, ready-to-run upper receiver assembly. Built around the MK118 Mod 2-M architecture, it features a lightweight free-floated handguard with generous slotting for accessory mounting and a rigid upper that promotes consistent accuracy and smooth cycling.
This complete upper is well suited for extended-range target shooting, practical competition, and hunting where flat trajectories and repeatable hits matter. The threaded muzzle makes it easy to add a suppressor or preferred muzzle device, while the overall design integrates cleanly with compatible lowers for a straightforward upgrade path. Primary Weapons is known for thoughtful engineering and dependable performance, and this MK118 Mod 2-M upper continues that reputation.
Key Features:
- Manufacturer: Primary Weapons
- Model: MK118 Mod 2-M Upper 6ARC 18 LS Threaded
- UPC: 811154033284
- Category: Uppers
| __Capacity | NA |
| __Barrel Length | NA |
| __Optic Footprint | NA |
| __Action | NA |
| __Caliber | NA |
| __Model | MK118 Mod 2-M |
