Colt LE6920 with Colt 20 round mags and PMC ammo. I went to the range today to mainly fire my M&P .40 but brought along my AR. So the issue I had on a colt magazine fully loaded is it didn't fire a total of 5 times. The sequences went something like this... Bolt locked back, mag in, bolt forward, boom! Then next squeeze it just went click, wtf? Released the mag and chamber checked and a round was chambered. Hmmm ok. This same sequence happened 4 more times then I was able to fire the rest without a problem. I just brought 20 rounds to zero in my buis so I couldn't load another mag. Any ideas? I can only think the bolt wasn't all the way forward. But why?


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