I bought this on/off at the local pb store. Simply screws on the end of your asa, and put ur tank on the other end of the on/off. Just screw the little valve on and off simple. costs abot 20 bucks. Its better to just get a on/off for ur gun.
only purpose i really see this product being is for spyders. Since its hard to get drops/rail assemblies for them, so finding a bottomline system is hard. So by adding this it would help. But that seems to be about it.
