TargetTalk

I have access to a old firemans breathing tank which is just like a scuba tank. The place where I would thread my air gin cylinder adapter in is different though. can you just use brass fittings to adapt or do you have to change valve

Try here Air Hog
http://www.airhog.com/fittings.htm

Daisy

I have used both scuba bottles and airpack bottles for thier origanal purpose and air rifles. First keep in mind that both need to be hydrostatically inspected every 5 years by Federal law.Yours is probabaly due, the date should be stamped at the neck.Second some airpack bottles cannot be reinspected and cannot be used past 5 years of origanal manufacture. I just had one of my scuba hydroed for $35.00 BTW. Third most airpack bottles are 2250 psi and don't offer many refills as such. Fourth some older MSA airpack botles were 1100 psi and are basically unusable.