EMG Guardian Mock Suppressors are modeled after fire-arm suppressors that are commonly seen on various military and law enforcement weapons. While externally this provides the user with aesthetic improvements to complete their rifle's look; functionally these units feature a built-in ACETECH Lighter S Ultra tracer unit. This tracer unit is USB rechargeable and lasts a solid day's worth of games. Highly recommended for indoor and night time use. This unit illuminates BBs up to 35RPS, suitable for our high speed rifles.