FeaturesBuilt-In ACETECH Bifrost M Rechargeable TracerImproved illuminator for enhanced BB glow activation for an ultra bright traceSustained ROF up to 35 rounds per secondRechargeable built in Lithium Polymer battery; fully charged battery will last over 22,000 rounds. Open the flash hider and charges via micro USBWorks with green BBs onlyAuto shutoff after idling for 40 minutesFCC, CE, ROHS compliantPrecision CNC machined Strike Industries licensed Oppressor flash hider w/ 14mm negative threadFor a very long time players have wanted the ability to run tracer units without the bulk of a full size suppressor; while there were products that tried to fill this role, there was some efficiency to be desired in most cases.EMG once again focusing on what players want and building off of ideas of what we have wanted to see ourselves in the Airsoft market have finally come to fruition. Featuring the EMG Strike Industries licensed Flash Hiders with built in ACETECH tracer units; finally we have the combination of sleek, low profile muzzle devices combined with high efficiency tracer units.The ACETECH Bifrost M RGB tracer unit simulates muzzle flash with multi-colored flame effects. The effect of flame depends on volume volume of gas or fog around the muzzle, more volume makes for better effects.Manufacturer: EMG, Licensed by Strike IndustriesColor: RedSpecifications:Diameter: 40mmLength: 78mmThread Direction: 14mm CCWBatteries: Rechargeable Built-In LiPo BatteryMaterial: Aluminum, PlasticPackage Includes: Tracer Unit, Muzzle Device, USB-C Charging Cable