Primary Weapon Systems MK111 MOD 2-M Complete Upper .223 Wylde Gas Piston - 11.85"

Manufactured by Primary Weapon Systems
SKU: 18-2M111UA0B
MPN: 18-2M111UA0B
Manufactured by Primary Weapon Systems
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NOTE: This upper receiver has a barrel that is less than 16” in length and is intended for use in AR pistol or legal short-barreled rifle builds. Other configurations may violate Federal law.

For those looking to build an AR pistol or SBR that is different from your standard AR-15 platform, Primary Weapon Systems has you covered. The PWS MK111 MOD 2-M Complete Upper Receiver features a 3-position adjustable long stroke gas piston system for the ultimate in reliability and smooth function. The gas block adjustment switch is easily accessible through the free float PicLok handguard, so you can quickly add picatinny rails or M-LOK accessories. The barrel is machined from 416R stainless steel and features a .223 Wylde chamber for extreme accuracy potential. Additionally, the 11.85” barrel is button rifled with a 1:8 twist rate and has the Triad556 compensator to keep the muzzle flat. Change up your AR collection with the PWS MK111 MOD 2-M Piston Upper.

  • 3 Position adjustable long stroke gas piston
  • Mid-Length piston system
  • 11.85” barrel chambered in .223 Wylde
  • 416R stainless steel and Nitride finished
  • Triad 5.56 Compensator
  • Button rifled 1:8 twist rate
  • Proprietary slick side upper and BCG
  • Forged 7075-T6 aluminum
  • Radian Raptor charging handle
  • Pic-Lok free float handguard
  • Weight: 3 lbs. 14 oz.

The proprietary piston upper receiver is forged from 6061 aluminum and features a slick side design with an M4 flat top Picatinny rail for easily mounting optics. Even though it uses a proprietary upper and bolt carrier group, it is still compatible with AR-15 charging handles like the ambidextrous Radian Raptor.

The mission at Primary Weapons Systems is to provide the highest quality tactical and sporting rifles and accessories for sportsmen, military, and law enforcement at a fair, competitive price.
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AssemblyComplete Assemblies
Barrel ContourMedium
Barrel Length11.85
Barrel Material416R Stainless Steel
BrandPrimary Weapon Systems
Caliber Gauge.223 Wylde
Gas System LengthMid-Length
Gas System TypeLong Stroke Gas Piston
Muzzle DeviceTriad556 Compensator
Twist Rate1:8

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