Revamped for 2018, the MK1 MOD 1-M line incorporates the renowned PWS long stroke piston system, delivering the performance and reliability that PWS owners trust. This tried and true system ensures smooth, consistent operation, making it a preferred choice for those seeking top-tier functionality. The rifle features a free-float M-LOK handguard, forward assist controls, and a design that stays true to mil-spec standards, making it a versatile option for both civilians and law enforcement professionals alike. With fully forged receivers, the MK1 MOD 1-M is built to withstand the most demanding conditions. Its rugged, no-nonsense construction guarantees durability and dependable performance, whether you're engaged in tactical operations or enjoying a day at the range. Offering a high-value solution without sacrificing quality, the MK1 MOD 1-M is a relentless and unstoppable tool that excels in any environment.

M-LOK handguard, providing a secure and versatile platform for attaching accessories, allowing for easy customization to suit your needs
The long stroke piston system offers reliable operation by efficiently managing gas flow and reducing recoil, ensuring smoother cycling during use

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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.