A model developed after the M4 pattern Upper, the PWS MK114 Upper has quickly become the crowd favorite for those wanting a compact package without the NFA paperwork associated with shorter barrels. The MK114 retains lethal capability out to 500 meters with varying types of ammunition and boasts a permanently attached FSC556.
Utilizing the proven system originally designed for the MK107, the MK114 uses a mid length gas piston system. The operating system, designed after the venerable AK-47, features a long stroke fixed operating rod design with an adjustable gas block, 15” handguard and free-floated barrel.
The handguard features the VLTOR KeyMod System which comes standard with two 2” sections of 1913 rail as well as a continuous 1913 top rail.
Understanding the importance of an ultra-reliable package that is light as possible, mil-spec forgings are used for the upper and lower receiver. Additional features include the BCM GUNFIGHTER™ charging handle.
4 lbs, 3 oz (1.90 kg)
23.5” (60 cm)
14.5” (36.8 cm)
2915 ft/sec (ss109)
PWS Forged Mil-Spec Upper
PWS Isonite Treated 1:8 Twist Barrel
PWS Enhanced Bolt Carrier Group
PWS KeyMod Rail System
BCMGUNFIGHTER Charging Handle
Primary Weapons Systems, Inc (PWS) is a Federally-licensed firearms manufacturer located in Boise, Idaho. PWS is the designer and manufacturer of the MK1 and MK2 series rifles and uppers in addition to a complete line of flash suppressing compensators such as the FSC556, SM556, FSC30, and more. PWS develops items based on real world requirements with the goal of redefining accuracy and performance in the piston-driven platforms.
All parts manufactured by PWS are done so on state of the art CNC Machines such as Okuma Multus B300 lathes, HAAS VF-4 mills and more. Any components that are not produced by PWS are purchased from only the best manufacturers to ensure the highest quality products are delivered to the end user.
Our CNC machines are programmed and operated by true craftsmen who are also shooters. It is this combination that enables us to provide our clients with the highest quality products that are not only aesthetically appealing, but also very functional
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