In a previous video, Angus showed a shooting test of the new KWA KM4 KR12 KeyMod AEG. For this video of Deathcore Airsoft, it is the full review. This AEG is one of the high-end AEGs released by KWA and uses the KeyMod rail system, an open source design allowing anyone to build a rifle using this design without intellectual property violations. This AEG has a 12-inch KeyMod rail and a 16-inch barrel.