Identify this tank regulator

[netsurferdude2]

I was cleaning out paintball boxes this weekend and found this tank and regulator combo.

Can anyone tell me what it is and is it worth salvaging? I can see that the tank is dead but maybe I can use the reg on another bottle.

[Grendel]

Nitro Duck (Paintball Mania) adjustable regulator IIRC made by Rehvac Inc for them. This was a pretty good reg in its day but if I remember correctly the bottle threads are different then what we run today. Later they moved to the same threads everyone else was using and the X-treme regulators which are very good and can be set to 1100 psi for those High Pressure loving Automags.