The MK1 MOD 1-M line is engineered for reliability and performance, featuring the renowned PWS long stroke piston system that has earned the trust of dedicated users. This tried-and-true system delivers exceptional reliability and function, making it a preferred choice for both civilians and law enforcement professionals alike. With its free-floating M-LOK handguard and forward assist controls, the MK1 MOD 1-M provides enhanced flexibility and ease of use, while staying true to a more authentic mil-spec design. Built with fully forged upper and lower receivers, the MK1 MOD 1-M is a robust, no-nonsense tool designed to handle demanding tasks with precision and durability. Whether you're in the field or at the range, this rifle is a relentless performer, offering high-value without compromising on quality. The MK1 MOD 1-M is the ideal choice for those who require a dependable, unstoppable rifle that excels under pressure and provides long-lasting performance.

The 16.1 inches .223 Wylde barrel is compatible with both .223 Remington and 5.56 x 45mm ammunition
The barrel twist rate is 1:8, designed for optimal stability and accuracy with a wide range of bullet weights
Muzzle velocity 2980 fps, ensuring high-impact energy and precision at extended ranges
PWS FSC 556, a muzzle device designed to reduce recoil and muzzle rise for more stable shooting
PWS proprietary piston upper, T6 7075 forged, anodized, ensuring reliability and durability with a high-quality piston-driven operating system
PWS M-LOK 15.05 inches handguard, providing a sleek and ergonomic platform for mounting accessories with an M-LOK system
Radian Raptor ambidextrous charging handle, allowing for smooth, efficient operation from either side of the rifle

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.