Yugopap4me 29 Posted July 15, 2013 Report Share Posted July 15, 2013 Maybe about 8 years ago I remember seeing a advertisement about new gas system for SBRs "m4" if I remember right. This gas system claimed to give a increase in velocity so that you could achieve full-sized rifle results in a carbine package. Does anybody know what I'm talking about? I can't remember what they called it and I can't find it in any searches. It obviously didn't sell well but now that I remember reading about it I kinda want to know more about it. Quote Link to post Share on other sites
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