About the Primary Weapons Systems MK114

This PWS upper features a 14.5-inch barrel chambered in 6ARC, a cartridge known for its ballistic performance. The long-stroke piston operating system is designed to run cleaner and cooler than direct impingement systems, which can lead to increased reliability and reduced maintenance.

Its compact 14.5-inch barrel length, when paired with a pinned and welded muzzle device to meet NFA regulations, makes it suitable for a variety of applications. The 6ARC chambering offers potential for precision shooting at extended ranges, while the overall size can be advantageous for home defense or general range use.