Featuring the patented VK-1 piston system, VK-1 Complete Upper Receivers are specifically tuned to maximize reliability in all conditions with the smallest footprint possible. The 15 slot upper receiver rail creates a truly continuous 12 o’clock Picatinny mount, optimizing available accessory real estate and reducing the overall weight of the forged receiver.

A hammer forged 1-7 barrel is thermal fit to the receiver to provide the highest level of accuracy potential while eliminating any heat-related POI shift. Includes a precision machined one-piece patented bolt carrier with correct timing, revised cam path, finished in industrial hard chrome. Patented enhanced cam pin for consistent lock up, shot after shot.