My weapon has had this issue the past couple of times I have gone to the range. Sometimes the bolt locks back on a dry weapon, and sometimes it doesn't. I lube up the BCG and and the buffer assembly generously and then it solves the problem until about 3 or 4 mags later, then it starts happening again. I'm thinking maybe it has something to do with the low profile gas block that I installed to replace the front sight gas block when I got a longer free-float rail, as the weapon didn't have this problem prior to the change. I suppose it might also have something to do with the buffer, as I changed those out some time ago too. But it's an H buffer and I have always been under the impression that that's the best buffer for a 16 inch barrel with a carbine length gas system. Does anyone have any suggestions about what might be causing this malfunction. Any ideas would be very much appreciated, as I know that there are folks on here that know infinitely more than I do about trouble shooting the AR platform. Thanks in advance.


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