You can turn off the air to the gun but it does not bleed off the air still in the adapter. The tank is still supplying pressure to the adapter because the tank it's self was never actually turned off. It will still put pressure on the o-ring as you take the tank off(which is usually the reason for o-rings blowing), which defeats the purpose of having an on/off adapter in the first place. It's alright if you're using N2/HPA and you do not need to take the tank off your gun.
Make sure if you get an on/off ASA, it is one that we bleed when you turn it off, like a CP ASA.
3 out of 10
Last edited on Sunday, March 4th, 2007 at 1:37 pm PST