Airsoft Coleraine Airsoft Team have this new video review of the Big Dragon Tracer Unit courtest of Airsoft Club. This an affordable tracer unit as it costs US$36.99 and can readily fit 14mm CCW threads. Once you have installed 4 triple A batteries and loaded with tracer BBs, you're ready for night ops. If you can handle the constant camera movement in the video, then watch it: