Molcom checks out the STS K1A GBBR which is based on the South Korean SMG. The STS K1A, a highly realistic GBB (Gas Blowback) rifle replica features an aluminum bolt carrier, steel outer barrel, Angry Gun NPAS Nodding Nozzle & Chamber & Inner Barrel & Hop-up Rubber for enhanced performance, and fires in single shot, burst, and automatic modes. The rifle is adjustable in length (653mm-838mm) and weighs 2200g. It comes with a 30-round magazine.