Acetech is founded by former Xcortech team members to build better airsoft related electronics. Predator AT2000 Tracer Modification Unit For D.I.Y. your tracer only, NOT a completed tracer Brightest tracer module designed to install into a silencer. After installing, the silencer could be used as a tracer unit. Make sure the dimension of your tracer should be larger than diameter: 32.2 mm, length: 113mm that AT2000 can be installed in Use 4 AAA Alkaline batteries or heavy duty Ni-CD rechargeable batteries. Support up to 30 PRS, no light decaying, missing lighting 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 Q&A Q1:Does AT2000 fit on my airsoft gun? A1: AT2000 fits on any 14mm CCW barrels Q2: :Does AT2000 support Red tracer BBs? A2: Yes, it works, but not effectively. Not recommend