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New AR15 with M4 barrel and all new parts, properly headspaced and the first round fired fine but would not extract.. normal pressure indications but note the ring around the case just below the shoulder, and the rim ripped off by the extractor.. I know what I think it is, what do you think?
Next issue.. since the extractor tore loose the second round was fed and ran into the M4 barrel extension where it sticks out just a bit over the lowers M4 grooves, (It shouldn't) and took a real beating. I had no problem at home manually cycling rounds. i can file the barrel extensions with a chainsaw file but with the first issue I'm not inclined unless the stuck case issue can be fixed
This is the case where the bolt over rode the case after the bullet tip got stuck in the M4 extension "gap"..
More info.. new 20 rd C products mag and SS109/M855 mil spec NATO ammo were used
Next issue.. since the extractor tore loose the second round was fed and ran into the M4 barrel extension where it sticks out just a bit over the lowers M4 grooves, (It shouldn't) and took a real beating. I had no problem at home manually cycling rounds. i can file the barrel extensions with a chainsaw file but with the first issue I'm not inclined unless the stuck case issue can be fixed
This is the case where the bolt over rode the case after the bullet tip got stuck in the M4 extension "gap"..
More info.. new 20 rd C products mag and SS109/M855 mil spec NATO ammo were used