PWS MK116 MOD 2-M UPPER 16.1″ BLK

Description

The Primary Weapons Systems MK116 MOD 2-M is built for shooters who want a piston-driven AR-15 upper that handles suppressed and unsuppressed fire without separate parts or tuning headaches. It suits the precision-minded builder who is done chasing gas system problems and wants a complete, ready-to-run upper from a domestic manufacturer.

The long-stroke piston system moves the operating mass differently than a direct-impingement design — the carrier is driven by the piston through its full travel rather than by a gas tube venting into the bolt carrier key. The practical result is that combustion gases and carbon stay forward of the receiver, and the recoil impulse is slower and more of a push than a sharp tap. The three-setting adjustable gas block lets you dial back gas volume when running a suppressor, keeping the action cycling without hammering the carrier or venting excess gas rearward. No tools are needed to change settings.

The 1-8 twist rate stabilizes the range of projectiles most .223 Wylde shooters reach for — from 55-grain loads through heavier 77- and 80-grain match bullets — without over-spinning lighter varmint projectiles into the instability range. The .223 Wylde chamber is dimensioned to accept both .223 Remington and 5.56mm NATO ammunition while maintaining the tighter throat of a match chamber, so you are not choosing between feeding reliability and accuracy.

The MOD 2-M receiver omits the forward assist for a cleaner profile, and the PicLok handguard pairs full-length M-LOK slots with integrated Picatinny rail sections so you can mix accessory types without adapter plates. The FRC two-port compensator is threaded for Rearden Atlas suppressor mounts if you want to run a can without changing the muzzle device. PWS covers the barrel with a sub-MOA accuracy guarantee and backs the upper under its VOW warranty for manufacturing defects.