if anyone invests in one of their radially delayed 9mm Guard carbines please give an impression... I've been playing with my blow back 9mm carbine for a couple of years now, and have it running pretty flat with not much dot shake... CMMG has the barrel and bolt for around $400 but I would have to see a considerable improvement over what I have...I haven't seen one of the Guards at local matches, so haven't been able to try one myself... shot a SiG MPX the other day, shot flat, but very heavy for my liking....