2" - Backpressure Caps

A back-pressure cap is a thin paper cap that fits externally over a 2" Aerotechnic™ barrel.  Essentially, they hold back pressure until enough is built up to force the pressure cap to blow off. When they do, a semi concussive sound is heard. The user will find, when using caps, the streamer load will travel much further (about 30%) and the product will function more efficiently. In some cases, a smaller CO2 cylinder can be used, decreasing your operating costs. This cap fits over the muzzle end of the barrel and must be taped air tight in place.

Normally, without using an o.d. cap, a streamer device can be safely shot towards people with little fear of injury as long as you are at least 20 feet away. If you are firing up and over the top of a crowd, it doesn't matter how close you are because the streamers and/or cap are falling by gravity at a lower rate of speed. Since the caps are thin and of poor aerodynamic design, they will usually not travel far but I would not want to get hit with one as they do sting. So when using caps, a good rule to follow is ....