ACETECH makes some of the best tracer units for both rifles and pistols.
The ACETECH Bifrost Tracer Unit is a compact unit that ideally works with Airsoft pistols and Airsoft rifles.
Coming with 14mm CCW threads, the tracer unit can thread onto guns with internal threading or you can opt to use its 11mm CW thread adaptor for easy threading onto other guns.
This tracer is also compatible with both red and green tracer BBs as well as having a new red tracer emblazing technology allowing for brighter red color bbs.

The ACETECH Bifrost BT Tracer Unit is also Bluetooth-compatible. making it easier than ever to adjust your color preference or flame effect. This feature makes using the ACETECH Bifrost BT Tracer Unit a breeze, no more taking off the tracer unit to fiddle with the buttons to get it to your preferred settings.