The Gessaba Channel shows the Tokyo Marui M870 Breacher that has an external power source, M4 magazine adapter and muzzle flash tracer. The Tokyo Marui M870 Breacher airsoft shotgun is a gas-powered pump-action dream for close-quarter battles. It combines a realistic metal build with the convenience of using standard shotgun shells, letting you choose between 3 or 6 BBs per shot. The gas system provides smooth pumping and rapid follow-up shots, plus the satisfying click-clack of a real shotgun.