pipe sizes. 50 mm for chamber
25 mm for barrel
6.0013 mm pipe for b.b's (made to fit b.b from hobby shop expensive)
blowgun was modified to allow more airflow.
the rubber tubing used was exactly just under 6mm.
please tell me what you think. and by the way theres many many more to come.

the blow gun

the end of the pipe isnt painted because i had a scope on it.

the unique rubber tubing system which is fed by a cloud chamber.