Internal tracer function on a M4 AEG. By mounting a series of powerful mini LED's onto the Hop-up chamber, the tracer BB's can be charged with light while they are on route to the chamber, eliminating the need for an external tracer unit. Powered by the AEG's internal battery. Everything needed is included.
•Life 10000+ hrs
•8 Blue SMD LED (O.C.)
Note: Once plugged with battery, LED module will start consume battery (1 watt.) You have to unplug the battery to turn it off.