The MK1 MOD 1-M line, redesigned for 2018, delivers unmatched reliability and performance with the proven PWS long-stroke piston system. Built to meet the demands of both civilians and law enforcement, this rifle retains the trusted internals that PWS owners rely on while incorporating modern upgrades for enhanced functionality. A free-float MLOK handguard provides versatility for accessory mounting, while forward assist controls and a refined mil-spec design ensure seamless operation. Fully forged upper and lower receivers create an incredibly durable and battle-ready platform, making the MK1 MOD 1-M a powerful choice for those who require a rifle that is built to perform under any conditions.

PWS long stroke piston system, 3-setting adjustable gas regulator, allowing for fine-tuned adjustments to suit different ammunition types and performance needs
The firearm is chambered in .223 Wylde, offering compatibility with both .223 Remington and 5.56 x 45mm cartridges
The barrel length is 14-1/2 inches, offering a balanced combination of performance and portability
The mid-length gas system provides a balanced cycling action, offering reliable performance and reduced recoil, making it a versatile option for various rifle configurations
The barrel twist rate is 1:18, suitable for shooting lightweight bullets with greater precision
Muzzle velocity 2921 fps, providing a higher velocity for improved long-range shooting
No muzzle device included, all NFA rules apply, so ensure compliance when purchasing
The PWS proprietary piston upper receiver is forged from T6 7075 aluminum and anodized for superior strength
The PWS M-LOK 13.624 inches handguard offers the same 1.7 inches width and 2-1/4 inches height, providing more rail space for longer barreled setups and enhancing firearm customization
The Radian Raptor ambidextrous charging handle provides smooth, reliable operation for both right and left handed users

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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.