06-08-2015, 07:21 AM
Stirling Wrote:That was my first thought and I checked it more than once. On my first trip to the range after several rounds, I did notice it was loose. I heated the block up with a heat gun and tightened it down. I thought that would solve the problem. It didn't. The next time I shot it, I needed a cleaning rod to remove the shells. That's when I installed the heavier spring and o-ring. I also checked the gas block and tube again. Based on the powder marks around the gas port, it was centered. Plus, the bolt never failed to lock back on an empty mag. So the bolt was cycling fine. It just wouldn't extract the shell at all.
Just my opinion but it sounds more like a bolt or extractor problem rather than the barrel. The extractor could be out of spec causing extracting problems. Whats the brass look like after you get it out, any marks on the extractor groove from the extractor? It might be worth your while to get another bolt and give it a try, especially if the barrel shoots that well. Either way you would have a extra bolt if you ever needed it.