PewClub Entertainment finds the Predator MK3 tracer unit from Acetech the best muzzle device for airsoft use. The Acetech Predator MKIII Tracer Unit builds upon the successful design of its predecessors, incorporating a Blaster M module within the compact unit. This addition provides both realistic muzzle flash simulation and the signature bright tracer function, eliminating the need for specialized tracer BBs for the flash effect.