HELP! .....dedicated .22lr CMMG AR upper issues

Just a quick update:
I contacted Questar and they agreed immediately to provide a replacement spring from CMMG. Of course it took a few weeks for CMMG to ship springs to Questar and then Questar to ship to me. A package of 5 springs arrived on Thursday, however I have been away all week so I just got the chance today to replace the spring and will probably have to wait until next weekend to try it out. I am hopeful that this will resolve all my previous issues.
 
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Took the CMMG upper out to the range last Saturday. Shot about 300-400 more rounds including Federal and Golden bullets. Still going strong. I've had one occurrence, however. It would seem the 22LR bolt screwed up my SR-15 hammer's reset after a shot. The bolt wouldn't cycle after that. I broke the gun in half and noticed the hammer was sort of half-cocked. I fixed it and kept shooting. Has this happened to anyone?
 
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