Actually there is a Russian early 20th Century revolver that as it moves to full battery, as the trigger is squeezed, the cylinder is forced into a second forcing cone and totally seals the cylinder/barrel. It has been suppressed by some of the Soviet "units".
The match between cylinder and barrel has to be perfect or the escaping gasses are loud enough to negate the suppressor.
At lest that has been my experience. I am always up for learning new stuff.
Well crap, just read up from here and saw that Guy had already brought that up. Could not remember if the revolver was a Nagant or not and he answered that one as well. Also Guy is correct, it is the brass then is forced by expansion into the forcing cone sealing the gasses into the barrel.
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Rick B.
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