Piston systems are proprietary, meaning every system is different because it is not standardized. Different types of systems, like long stroke, short stroke, different gas blocks, gas port dimensions. Everyone's got their own take on it. H&K, LMT, POF, LWRC, STG, AA, etc etc etc.
I'm afraid your question is too general. You will have to refer to the manufacturer.
Assumption is the mother of all ****ups.
Know what you know, Know what you don't know. -Paul Pedzolt
"Jack of all trades, master of none, though oftentimes better than master of one" -Mynshul
Last edited by AgentTikki; 05-17-2013 at 05:27 PM.