Fishco Posted November 9, 2011 Report Share Posted November 9, 2011 I have built 4 DPMS lr-308 rifle and my last one has me baffled! The problem is that it won't cycle a round and load another, hold on, its not a magazine problem. You can manually cycle rounds and emptys through the magazine and no problem.When I fire it, the bolt comes back about 1/2-3/4 inch and thats it, you can go ahead and manually cycle it out, but the gun wont do it.I have tried this with a 16" & 20" barrel and the same issue.I have tried other barrells on this lower and no problem.I have swap complete carriers and still same issue.The only thing I have found is that the gas tube doesn't come into the upper as far as my others.It is about 1/4-5/16 inch short, therefore it is not seating in the gas carrier as far as my others.I have re-torqued the barrel many times and it still wont go any deeper, changed the gas blocks and still the same.All parts are factory DPMS, they won't help me since they didn't assemble it...What the crap have I done???Please help! Quote Link to comment Share on other sites More sharing options...
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