[ARCHIVED THREAD] - Tight Bolt

Posted: 5/29/2008 2:59:17 PM EDT

I'm putting together a 6 MM PPC upper and got some parts out I bought years ago. I have an OLY 7.62 bolt and a DPMS carrier assembly. The bolt is so tight I can only get it to move in the carrier with a pretty good effort hanging onto the bolt and working it in my hands.

A DPMS (current production) 223 bolt slides in and out nicely.

The question is should I polish the "collar" that sets behind the extractor pin? I think that the parkerizing probably made it a tad tight?

How critical is the matching of this collar and the bore of the carrier? Could I over polish it? I can run a dremel with a polishing bit it over the collar.

Thanks,
Greg

Posted: 5/29/2008 3:20:44 PM EDT

[#1]

Are you using a McFarland 1-piece gas ring? If so, thats why it's tight. Either live with it until the ring wears in or replace it with the 3 standard gas rings.

Posted: 5/29/2008 3:25:16 PM EDT

[#2]

Nope this bolt is 15 years old never out of the package. It has the normal three ring set up.

Greg

Posted: 5/30/2008 12:17:58 PM EDT

[#3]

I suppose the gas rings will eventually wear themselves out through normal use. If this doesn't comfort you, I guess you can get a new set of gas rings and see what happens.

[ARCHIVED THREAD] - Tight Bolt

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[ARCHIVED THREAD] - Tight Bolt

[ARCHIVED THREAD] - Tight Bolt