PWS MK116 MOD 1-M Complete Upper Receiver 7.62x39mm 16" – AR-15 Platform

The PWS MK116 MOD 1-M is a complete upper receiver assembly chambered in 7.62x39mm, designed to convert any mil-spec AR-15 lower into a reliable platform for this popular intermediate cartridge. Built around a 16-inch barrel with PWS's long-stroke piston operating system, this upper delivers consistent performance with steel-cased ammunition and eliminates many gas system issues common to direct impingement conversions. The MOD 1-M configuration includes PWS's modular M-LOK rail system for mounting accessories while keeping weight manageable.

Constructed with a 4150 chrome moly vanadium barrel and finished in black, the MK116 features PWS's proprietary FSC muzzle device and ambidextrous controls. The long-stroke piston system keeps heat and fouling away from the bolt carrier group, extending reliability between cleanings. This is a drop-in upper that requires no modification to standard AR-15 lowers—just ensure you're using 7.62x39mm-compatible magazines and a bolt appropriate for this caliber. Ships complete and ready to install.

• Caliber: 7.62x39mm
• Type: Complete upper receiver assembly
• Compatible Lower: Mil-spec AR-15
• Barrel Length: 16 inches
• Material: 4150 CMV barrel, forged aluminum receiver
• Finish: Black
• Includes: Barrel, bolt carrier group, charging handle, rail system, muzzle device
• Installation: Drop-in, requires 7.62x39mm magazines