Quote Originally Posted by markm View Post
Seriously? That has been anything but true for 5.56 platform.
Perhaps, but the USMC seems happy with its piston operated M27, and with the adoption of the NGSW (whichever version--probably Sig Spear), the DI 5.56 will be on its way out of regular use, as will the 5.56 itself. Anecdotely, I own 7 piston operated 5.56 rifles and have never had a single problem with any of them. To be fair, I also have several DI 5.56 rifles as well, and similar results. To me the key is to buy good quality weapons and then take care of them.