The VKTR Industries VK-1 Complete Upper is a high-performance 5.56x45mm NATO assembly finished in Armor Black. It features a 16 cold hammer-forged (CHF) barrel with a 1:7 twist, machined cooling flutes, and a QPQ nitride finish for maximum durability. Built on a thermal-fit forged aluminum receiver to eliminate heat-related POI shift, it utilizes the patented VK-1 Short Stroke Piston System. This AR-15 unit includes a 15 low-profile M-LOK handguard, a Radian Raptor ambidextrous charging handle, and a one-piece chrome-finished bolt carrier group. Note: This piston-driven upper typically includes a required carbine buffer and spring to ensure optimized cycling and reliability within the VK-1 system.