ACETECH Airsoft Gun 14mm AT1000 Tactical Tracer Unit Glow in Dark The Brightest tracer unit in the world Use 4 AAA alkaline batteries lasting for 20,000 rounds, or use 4 eneloop rechargeable AAA batteries lasting for 100,000 rounds. Sustained ROF up to 1800 RPM Supports only green tracer BBs FCC, CE, RoHS compliant Sustained ROF up to 1800 RPM Auto Power OFF Low Battery Indicator Use of 4 AAA alkaline batteries lasting for over 100,000 rounds Reverse 14mm thread (14mm CCW Thread) Dimension : 156mm x 37mm Weight : 140g without battery A1: AT1000 fits on any 14mm CCW barrels A2: Yes, it works, but not effectively. Not recommend.