Airsoft Atlanta got a bunch of airsoft tracer units from AceTech, including the Lighter BT... "Brand New Acetech tracer units in stock! The newest release is the Lighter BT that works perfectly with red and green tracer rounds, rechargable battery built in. Also new is the custom MP7 AEG 9mm style tracer. It's huge at 9 inches long and all metal. Includes a QD attachment system and metal black MP7 flash hider native to the HK 14mm CW threads. Fits the official VFC Umarex AEG and others possibly. All available now in store or online."