Primary Weapons Systems MK114 MOD 1-M Upper 6ARC 14.5 LS FRC Compact

Description

Product Overview

The Primary Weapons Systems MK114 MOD 1-M Upper 6ARC 14.5 LS FRC Compact is a precision-focused, piston-driven AR upper built around the efficient 6MM ARC cartridge. The PWS Long Stroke Piston system helps keep fouling down and supports consistent cycling, while the 3-setting adjustable gas system lets you fine-tune performance for changing conditions and suppressor use. With a 14.5 inch barrel and compact FRC configuration, this upper is designed for shooters who want a flatter, efficient trajectory with manageable recoil and strong energy retention.

Key Features

• Long Stroke Piston system for reliable operation and reduced fouling versus direct-impingement setups
• 3-setting adjustable gas system for tuning unsuppressed or suppressed configurations
• Chambered in 6MM ARC for efficient ballistics with flat trajectories
• 14.5 inch barrel length for a compact, practical setup
• FRC Compact front end for a more maneuverable profile

Build your next precision or tactical platform on the MK114 MOD 1-M and tune the gas to match your optics, ammo, and suppressor setup.