Originally Posted by
Hsing-ee
Ah ok I got it. I think I had an idea for a reverse-tune rifle once, doing the whole thing incorrectly.
Loosely fitting PTFE piston head with lots of lost volume, as much square-section magnum mainspring as could be crammed in, no spring guides to ‘save friction’ transfer port drilled out to 5mm, lubricated with Castrol-R, front shotgun bead sight no rear sight for rapid target acquisition, 10 inch uncrowned hacksaw abbreviated barrel, Mauser broomhandle pistol grip and Tommy gun front grip. To be shot rapid fire off the front foot leaning forward.