Pws Mk111 Mod 1-M Upper 7.62X39 11.85 Ls Frc

The Primary Weapons Systems Mk111 Mod 1-M upper receiver in 7.62×39 gives you a combat-proven, modular upper built to PWS's exacting standards. Whether you're assembling a new rifle or upgrading an existing one, this 11.85-inch upper combines a short, handy profile with the raw capability of the 7.62×39 cartridge—ideal for intermediate-range shooting, hunting, or tactical applications where compact handling matters. PWS has earned a solid reputation for precision machining and reliability in the field, and this upper reflects that philosophy.

The Mod 1-M designation signals this is PWS's latest iteration of the Mk111 platform. The 11.85-inch barrel length hits a practical sweet spot: short enough to keep overall rifle length and muzzle blast manageable, yet long enough to deliver the velocity and sight radius you need. The FRC (likely referring to PWS's proprietary muzzle or gas system configuration) is engineered to cycle reliably across the wide range of 7.62×39 ammunition types you'll find in the market, from military surplus to modern factory loads.

As an upper receiver assembly, this is the top half of your rifle—you'll need a compatible lower receiver, bolt carrier group, and charging handle to complete the build. PWS uppers are known for tight tolerances and consistent performance, making them a solid choice if you're building a rifle that needs to go to work. The 7.62×39 chambering gives you access to affordable, widely available ammunition while delivering more energy than 5.56 at similar distances.

Key Features

• Primary Weapons Systems Mk111 Mod 1-M platform—combat-tested, precision-machined upper receiver
• 7.62×39 chambering for versatile intermediate-range shooting and hunting applications
• 11.85-inch barrel for compact handling without sacrificing velocity or sight radius
• FRC configuration for reliable cycling across varied ammunition types
• Modular design integrates with compatible AR-15 style lower receivers

Specifications

Frequently Asked Questions

What lower receiver will this upper work with?

This is a standard AR-15 style upper, so it will mate with any compatible AR-15 lower receiver. Confirm your lower's caliber and profile alignment before assembly.

Is this a complete upper or will I need additional parts?

This is an upper receiver assembly. You'll need a lower receiver, bolt carrier group, charging handle, and magazine to complete a functional rifle.

What kind of shooting is the 11.85-inch barrel best suited for?

The compact 11.85-inch length makes this upper well-suited for intermediate-range shooting, hunting, tactical applications, and situations where a short, maneuverable platform is an advantage. The 7.62×39 cartridge delivers solid performance at typical hunting and combat distances.

Will this upper cycle reliably with different brands of 7.62×39 ammo?

PWS's FRC system is designed for reliable cycling across a wide range of 7.62×39 ammunition, including military surplus and modern factory loads. As always, function can vary with specific ammunition types—test thoroughly before relying on any new rifle in the field.