Originally Posted by Formidilosus
Originally Posted by jimmyp

Pistons are just something else to sell something to fix a problem that does not exist



For clarity the short stroke piston M4 (HK416) was developed for a reason. That being reliability and service life from the military issued CQBR (10.5 inch M4) suppressed and with extremely heavy firing cycles was less then ideal. You have to understand that in 2003-2004 the issued 10.5in upper for certain military users was not the 10.5 inch guns we have now. We didn't have the buffers, springs, adjustable gas blocks, and fully developed barrels that are available. I have been issued and used the original CQBR, HK416, and current issued MK18 10.5 inch guns. The 416 was the piston guns all other were measured against. And truthfully was the gun all SBR's were judged against for military use. For several reasons that is not necessarily the case anymore.


Unless you need a suppressed, short barrel rifle, for heavy firing cycles, most users would be better served with the standard DI AR15/M4.


Problem there as noted, is not that it needed a piston but some design idiot needed to note there are relationships with gas ports, lag time, burn rates, carrier weights etc... and follow the relationship, not simply shorten the barrel basically and expect it all to work just fine.

We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....