The VK-1 rifle uses a patented low-profile piston system design featuring optimum gas port sizing and an advanced piston assembly. This features a unique cup and spigot design that improves the gas seal and overall efficiency of the gas system. The VK-1 includes a staged gas bleed system that allows the rifle to operate consistently, either suppressed or unsuppressed, with varying types of factory ammo. Features Radian Weapons Raptor charging handle; Talon selector;ambi controls; continuous 12 o'clock Picatinny Rail; thermal fit forged upper receiver; patented VK-1 piston system; A2 flash hider; Magpul MOE SL Buttstock and K2 Grip; Magpul MOE Enhanced Trigger Guards; Low Profile M-LOK handguard and machined cooling flutes.