Description: ASG B&T Tracer Unit This look-a-like silencer tracer unit uses a compact powerful flash to charge your tracer BB's with light making them self illuminating, and creating a tail of green light following them as they shoot down the range. Obvious they work best in dark rooms and during dusk and night. Being able to see where the BB's are going lets you aim better, and puts fear in your opponents, as they watch the shoots coming at them. Full metal. Compact size. On/off switch with indicator marking. High power flash. Counter clockwise thread. Checkered grip area. B&T markings. Authentic silencer look. Uses 4 AAA batteries (not included).