Primary Weapons Systems MK114 Piston-Driven 5.56 NATO Black Rifle

Description

Product Overview

The Primary Weapons Systems MK114 is a 5.56 NATO semi-automatic rifle built around a reliable long-stroke piston operating system. Its piston-driven action helps reduce fouling in the receiver while the enhanced bolt carrier group and Isonite-treated internal components support dependable service use. The rifle features a stainless steel, button-rifled barrel with a 1:8 twist and a permanently pinned SM556 muzzle device that provides a compliant 16.1-inch barrel configuration. A collapsible Magpul MOE stock, Magpul grip, MBUS sights, XT rail panels, and a 30-round PMAG complete this practical M4-pattern setup. The barrel length is 16.1 inches, and the overall length is 31.25 inches.

Key Features

• Long-stroke piston system helps reduce action fouling for reliable operation
• 16.1-inch Isonite-treated stainless steel barrel with a 1:8 twist
• Permanently pinned SM556 muzzle device provides a compliant non-short-barreled-rifle configuration
• Enhanced bolt carrier group and Isonite-treated internals support durability
• Collapsible Magpul MOE stock allows the rifle to be adjusted for transport and handling
• Magpul MBUS sights provide dependable backup aiming capability and the receiver rail accepts aftermarket optics

The PWS MK114 combines piston-driven reliability with familiar AR-pattern ergonomics for range, duty, and defensive applications.