PWS Primary Weapons MK111 Pro 11.8 Comp Upper Adj Gas piston 223 556 Radian


New in box PWS MK111 Pro 11.85" adjustable gas piston complete upper receiver in 223wylde/5.56!  Pistol or SBR upper.  Comes factory new in box with manual!  Ships direct where legal.

The MK111 PRO Upper, features the PWS long stroke piston system. Internally, this line offers the tried and true system. Featuring a free-float MLOK handguard, with the fully forged upper. The MK111 Pro is a no-nonsense tool for when you need a high value option that is relentless and unstoppable.
  • Operating System: PWS Long Stroke Piston System, 3-Setting Adjustable Gas System
  • Caliber: .223 Wylde
  • Barrel Length: 11.85"
  • PWS free float Mlok(TM)11" Handguard
  • PWS Proprietary Piston Upper, 6061 extrusion, Anodized
  • Radian Raptor(TM)Charging Handle

Follow X-Werks on Instagram for Updates and specials!!  Xwerksaz

Please allow 2-4 business days for items to ship once payment and FFL are received.

Give us a call, stop by our shop, or email us with any questions! You can also purchase online anytime at!

FFL's can be emailed, faxed or mailed to us. Please reference your name and the item number to prevent any delays in shipping.

Long guns and accessories ship UPS Ground. Handguns are shipped USPS priority mail.

Once payment and FFL are received we will email you a tracking/delivery confirmation number.


Serial numbers will vary.