The VKTR VK-1 Complete Upper packages a short, hard-hitting 5.56 upper receiver into a mission-ready assembly built for compact rifles and pistol builds. At 11.5" with a heavy-profile, nitride-finished barrel and 1/2A-28 threading, this upper is optimized for suppressed or compensator-equipped hosts while preserving balance and durability. The thermal-fit forged upper, continuous 12 o'clock Picatinny, and low-profile M-LOK handguard give you a solid mounting platform for optics and mission accessories. VKTR specified practical, service-grade components where they matter: an H900-style heavy barrel with 1:7 twist, machined cooling flutes, and nitride finish for longevity; a Radian Weapons Raptor(TM) charging handle for ambidextrous, positive manipulation; and a forged thermal-fit upper for tight tolerances and repeatable zero. Threaded 1/2A-28 muzzle compatibility plus the included carbine buffer and spring make this upper a straightforward drop-in for many AR lowers-ideal for compact patrol rigs, truck guns, or short-range precision builds. Specifications: Caliber: 5.56 NATO Barrel Length: 11.5" heavy profile, 1:7" twist Muzzle Thread: 1/2A-28 Barrel Finish / Features: Nitride finish; machined cooling flutes Upper Receiver: Thermal-fit forged upper with continuous 12 o'clock Picatinny rail Handguard: Low-profile M-LOK handguard Charging Handle: Radian Weapons Raptor(TM) ambidextrous charging handle Included: Carbine buffer and spring