Primary Weapons Systems Mk218 Mod 2 Upper 308Win 18 Ls Frc Comp

The Primary Weapons Systems Mk218 Mod 2 upper receiver in .308 Winchester is a complete, ready-to-install top end built for serious rifle builders and shooters who demand precision and reliability. Paired with a matching lower receiver, this 18-inch upper delivers the accuracy and handling balance that long-range hunters and competition shooters expect from a modern AR10/SR25-pattern rifle. PWS engineering backs every component, so you're not just buying parts—you're getting a proven platform.

The 18-inch barrel strikes a practical middle ground: long enough to wring consistent velocity from .308 Winchester cartridges, short enough to keep overall rifle length manageable for hunting, vehicle carry, and tactical work. The integrated FRC Comp muzzle device tames recoil and supports precision shooting, whether you're dialing in a long-range load or working through transitions at the range. The matte finish resists glare and plays well with optics, suppressors, and lighting setups.

This is a complete upper, so it arrives as a matched assembly ready to function the moment you mate it to a compatible lower receiver. No gunsmithing, headspacing concerns, or secondary assembly required. If you're building a .308 AR10 or SR25 rifle from the ground up and want a no-compromise upper that consolidates quality and proven design, PWS Mk218 Mod 2 eliminates guesswork.

Key Features

• .308 Winchester chambering for versatile long-range and hunting applications
• 18-inch barrel optimized for velocity and handling balance
• FRC Comp muzzle device for recoil management and shooter control
• Fits AR10 and SR25-pattern lower receivers
• Complete upper assembly—no additional gunsmithing or headspace verification required
• Matte black finish for durability and low-glare performance

Specifications

Frequently Asked Questions

What lower receivers does the PWS Mk218 Mod 2 fit?

This upper is designed for AR10 and SR25-pattern lower receivers. Verify that your lower is chambered for .308 Winchester and compatible with the AR10/SR25 platform before ordering.

Is this a complete upper assembly, or do I need additional parts?

This is a complete upper receiver assembly. Once paired with a compatible lower receiver, it is ready to function without additional assembly or gunsmithing.

What is the FRC Comp muzzle device?

The FRC Comp is PWS's muzzle brake designed to reduce felt recoil and help manage muzzle rise, supporting accuracy and faster follow-up shots.

Is this suitable for hunting and long-range shooting?

Yes. The 18-inch barrel in .308 Winchester is a practical choice for both hunting applications and precision long-range work, with the compact length also making the finished rifle easier to handle in vehicles and tight spaces.