The Primary Weapons Systems PWS MK111 MOD 1-M Upper in 223 Wylde 11.85" is engineered for unwavering reliability and versatile performance, featuring the renowned PWS long-stroke piston system that delivers consistent cycling with adjustable gas settings for optimal operation across conditions, a free-float M-LOK handguard, and fully forged 7075-T651 aluminum upper and lower receivers that meet mil-spec standards for durability and familiarity. This compact, suppressor-ready upper is designed for civilians and law enforcement alike, offering a forward assist integration for reliable chambering in adverse environments and a sub-MOA accuracy promise thanks to Boise-made precision barrels. The chambering accommodates both .223 Remington and 5.56 NATO, ensuring outstanding accuracy and flexibility, while the PWS FRC 2-Port compensator minimizes recoil and muzzle rise and remains compatible with the Rearden Atlas suppressor mounting system. The Radian Raptor ambidextrous charging handle provides smooth operation for both left- and right-handed shooters, and the suppressor-optimized design enhances shooter comfort by reducing gas blowback. With the VOW warranty backing all PWS products, the MK111 MOD 1-M offers a high-value, ready-for-any-situation platform ideal for law enforcement, heli-hunting, and a wide range of tactical, competition, and precision applications.