PWS MK118 MOD 2 Upper Receiver in 6MM ARC: Precision and Power for Your AR-15
Elevate your shooting experience with the Primary Weapons Systems MK118 MOD 2 upper receiver chambered in 6MM ARC. Designed for enthusiasts and professionals seeking exceptional long-range performance, this upper combines advanced engineering with rugged durability. Whether you’re targeting game at extended distances or competing in precision matches, the MK118 MOD 2 delivers consistent accuracy and reliability in a versatile package.

Key Features and Benefits
- 18-Inch Barrel: Optimized for the 6MM ARC cartridge, providing excellent velocity and stability for shots beyond 500 yards.
- MOD 2 Enhanced Bolt Carrier Group: Features a proprietary design with improved gas efficiency and reduced fouling for smoother operation and extended service life.
- Rigid Handguard: A lightweight yet sturdy M-LOK compatible handguard offers ample space for accessories like bipods, lights, and grips.
- Adjustable Gas System: Allows fine-tuning for different ammunition types and suppressor use, ensuring reliable cycling in various conditions.
- Corrosion-Resistant Finish: A durable coating protects against harsh environments, making it suitable for hunting and tactical use.

Why Choose the 6MM ARC Caliber?
The 6MM ARC is a modern cartridge developed for enhanced long-range capabilities in AR-15 platforms. It offers flatter trajectories, less wind drift, and higher energy retention compared to traditional rounds like 5.56 NATO. Ideal for hunting medium-sized game or precision shooting, this caliber maximizes the potential of your rifle without excessive recoil. Pair it with quality optics from Texas Gun Store for unmatched performance.
Specifications at a Glance
Below are the detailed specifications to help you understand the build and compatibility of this upper receiver.
Frequently Asked Questions: Why Buy from Texas Gun Store?
- Expertise: Our team has years of experience in firearms and accessories, providing knowledgeable advice to match your needs.
- Quality Assurance: We source products from reputable manufacturers like Primary Weapons Systems, ensuring reliability and performance.
- Customer Support: From selection to after-sales service, we’re here to assist with any questions or concerns.
- Fast Shipping: We process orders promptly, with secure packaging to deliver your gear safely and quickly.
- Competitive Pricing: Enjoy fair prices on premium products, backed by our commitment to value and satisfaction.

Invest in the PWS MK118 MOD 2 upper to transform your AR-15 into a precision tool capable of handling demanding scenarios. With its robust construction and innovative features, it’s a top choice for shooters who demand excellence. Order today and experience the difference that quality engineering makes.
| Caliber | 6MM ARC |
| Barrel Length | 18 inches |
| Barrel Material | 4150 Chrome Moly Vanadium Steel |
| Barrel Twist Rate | 1:7.5 inches |
| Gas System | Adjustable, mid-length |
| Handguard | M-LOK compatible, 15 inches |
| Upper Receiver Material | Forged 7075-T6 Aluminum |
| Finish | Type III Hardcoat Anodized |
| Weight (Approx.) | 4.5 lbs |
| Compatibility | AR-15 lower receivers |
| Manufacturer | Primary Weapons Systems |





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