Buy MK118 MOD 2 Upper 6MM ARC
$1,499.00
The MK118 MOD 2-M Upper delivers unmatched precision and versatility, now chambered in the highly efficient 6MM ARC. Designed to provide flat trajectories, reduced recoil, and exceptional energy retention, this upper is perfect for precision shooters, hunters, and tactical applications. Powered by the PWS Long Stroke Piston System, it ensures reliability and reduced fouling, while the 3-setting Adjustable Gas System allows fine-tuning for optimal performance in diverse conditions, including suppressor use.
Discover the PWS MK118 MOD 2 Upper 6mm ARC — a premium long-range precision complete upper receiver engineered for shooters who demand maximum ballistic performance and reliability.
This upper features an 18″ 6mm ARC barrel paired with Primary Weapons Systems’ renowned long-stroke piston operating system. The result is a flat-shooting, low-recoil, highly accurate platform that outperforms traditional .223/5.56 at extended distances while maintaining cleaner operation and superior reliability compared to direct impingement uppers.
The MK118 MOD 2 upper is designed to pair perfectly with MOD 2-M ambidextrous lowers, making it the ideal choice for building a dedicated precision rifle, long-range target gun, or versatile hunting rifle.
Key Features & Benefits
- Long-Stroke Piston System: Exceptional reliability with minimal carbon fouling and gas blowback. Features a 3-position adjustable gas regulator for perfect tuning with or without a suppressor.
- 18″ 6mm ARC Barrel: Precision barrel with 1:7.5 twist rate, optimized for the high-performance 6mm ARC cartridge. Delivers outstanding velocity, flat trajectory, and sub-MOA accuracy at long range.
- MOD 2 Forged Upper: Lightweight forged 7075-T6 aluminum receiver with modern styling and enhanced ergonomics.
- 15″+ Extended M-LOK Handguard: Slim, free-floating design offers maximum accessory mounting space for bipods, optics, and other precision accessories.
- Suppressor Optimized: Low back-pressure piston system excels with modern suppressors for quiet, precision shooting.
- Premium Components: Enhanced PWS bolt carrier group, precision-matched internals, and high-quality muzzle device compatibility.
- Superior Ballistics: 6mm ARC offers significantly better long-range performance and wind resistance than 5.56 NATO.
Why Choose the PWS MK118 MOD 2 6mm ARC Upper?
The combination of the efficient 6mm ARC cartridge and PWS’s proven long-stroke piston system creates one of the best precision piston uppers available. It provides softer recoil, easier maintenance, and greater reliability than standard gas-impingement platforms. Manufactured in the USA, this upper is perfect for competitive long-range shooting, precision hunting, and tactical applications where accuracy at distance matters most.
Technical Specifications
- Caliber: 6mm ARC
- Barrel Length: 18″ with 1:7.5 Twist
- Gas System: Mid-Length Long-Stroke Piston with 3-Position Adjustable Regulator
- Handguard: Extended Free-Float M-LOK
- Upper Receiver: Forged 7075-T6 MK118 MOD 2
- Operating System: PWS Long-Stroke Piston
- Finish: Hardcoat Anodized Black
- Compatibility: Designed for MK1 MOD 2 / MOD 2-M ambidextrous lowers
Take your long-range game to the next level. Add the PWS MK118 MOD 2 Upper 6mm ARC 18″ to your cart today for unmatched precision and piston-driven reliability.
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