The Primary Weapons Systems PWS MK116 MOD 1-M Complete Upper, 7.62×39, 16.1in, Black (brand part no. MK1-M1U-762X39-16) is a complete AR-platform upper built around PWS’s long-stroke piston system, chambered in 7.62×39 with a 16.1-inch barrel, revamped for 2018 with a free-float M-LOK handguard.

Key Specifications

• Chambered in 7.62×39
• Barrel length of 16.1 inches, clearing the federal rifle minimum
• Runs PWS’s long-stroke piston operating system
• Fitted with a free-float M-LOK handguard
• Includes forward assist controls
• Built with forged upper and lower receiver construction
• Sold as a Complete upper, ready to install
• Finished in black
• Part of PWS’s MK1 MOD 1-M line

Frequently Asked Questions

Does this barrel length clear the federal minimum? Yes, at 16.1 inches it clears the 16-inch federal rifle minimum with no NFA concern.

What operating system does this upper use? PWS’s long-stroke piston system, keeping combustion gas out of the receiver.

Buy the PWS MK116 MOD 1-M Complete Upper, 7.62×39, 16.1in, Black

Order the PWS MK116 MOD 1-M Complete Upper, 7.62×39, 16.1in, Black from our catalog, or browse more AR15 uppers at Schaefer Defense. Ships fast from our Lubbock, Texas gun shop.