VK-1 Complete Upper – 16″ cerakote complete piston upper with 15″ handguard. Features Bolt Carrier Group – Precision machined one-piece patented bolt carrier with correct timing, revised cam path, finished in thin, dense chrome. Patented enhanced cam path for consistent lock up, shot after shot. Match performance right out of the gate. Enhanced Upper Rail – 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 upper receiver.