It isn't the gas seal that's "tricky", but the sliding cylinder lockwork that makes the gun more costly to build.
You want a disposable and quiet revolver? Make the majority of the gun out of plastic, with an ENCLOSED cylinder. Barrel gap becomes a non-issue when it just blows into an enclosed space. This might be dirty, but we were talking a gun of limited life.
I'll bet you could make everying but the springs, hammer, chamber liners, baffles and barrel liner from nylon.
You want a disposable and quiet revolver? Make the majority of the gun out of plastic, with an ENCLOSED cylinder. Barrel gap becomes a non-issue when it just blows into an enclosed space. This might be dirty, but we were talking a gun of limited life.
I'll bet you could make everying but the springs, hammer, chamber liners, baffles and barrel liner from nylon.