Brand: Primary Weapons Systems
Model: MK116 MOD 1
Caliber: 7.62X39
Barrel Length: 16.1"
Color: Black
Accessories: Radian Raptor
Description: M-LOK
Fit: AR Rifles
Finish: Anodized
Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator
Gas System Length: Mid-Length
Barrel Twist Rate: 1:8
Muzzle Velocity: 2980fps
Muzzle Device: PWS FSC 556
Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized
Handguard: PWS M-Lok 15.05" Handguard (1.7" width, 2.25" height)
Charging Handle: Radian Raptor Ambidextrous Charging Handle

Features

The MK1 MOD 1-M line utilizes the legendary PWS long stroke piston system, providing a reliable and proven internal design favored by tactical enthusiasts. This series includes a free-float M-LOK handguard, integrated forward assist, and a mil-spec aesthetic optimized for both civilian and law enforcement use. Built with fully forged upper and lower receivers, the MK1 MOD 1-M serves as a durable, high-value firearm engineered for relentless performance in demanding environments.

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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.