Quote:
Originally Posted by Spartan198
I've only ever heard it referred to as direct impingement gas. If there's another name for it, I've no idea what it is.
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I have read Stoner's original patent application a while ago, and he made a point of saying that it wasn't a direct impingement design. I have heard a rather long winded name for it at some point that was something to do with gas expansion and the piston being in line with the bore, but can't seem to find it now.