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9/22/2017 12:11:25 AM
Posted: 10/6/2005 8:04:09 PM EDT
I have a 6921 upper w/ a DPMS carrier and as of my last trip to the range it turned into a single shot. I looked at the top of my bolt carrier and noticed that one of the allen-headed screws had broken off. Prior to this, I have had zero problems but would it be smart to replace the carrier or just replace the allen screw. Also, if I did replace the bolt with a new colt one, what kind of headspacing issues would I have do deal with?? THANKS IN ADVANCE FOR ANY INFO
Link Posted: 10/6/2005 10:31:48 PM EDT
[Last Edit: 10/6/2005 10:50:48 PM EDT by Head_Space]
Replace both allen head bolts with new ones (refer to USMC TM 05538C-23 sec 3-11, pg 3-19/3-21) and make sure they are properly torqued or you will continue having problems.... As for replacing the bolt, if you do, check the headspace with a proper gauge to be on the safe side. Headspacing is a function of fit between the bolt and the barrel extension and when you replace one or the other, headspacing should be checked.

Good Luck....
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