[ARCHIVED THREAD] - New upper, same bolt?

Posted: 3/2/2005 10:42:26 PM EDT

Hey all, I have a post ban 20" Bushmaster, my plan was to get a 16" Bushmaster M4 type Pre-Ban upper when the ban was lifted and throw a scope on the 20" upper.

My question is this, can I use the Bolt & carrier assembly from the 20" upper and just keep the new bolt in the safe for back up?? or am I better off just using the new bolt in the new upper?

Thanks in advance!!

Stay Safe, Will

Posted: 3/3/2005 6:08:40 AM EDT

[#1]

I'm in the same boat. My plan is to check head space with no-go guage on used bolt. If it passes I put in new bolt and check headspace again. If new bolt passes it stays in. Old bolt gets rebuilt (rings, springs, etc) and stays in safe. If bolt goes bad I put in the backup while new bolt is on order. When new bolt arrives the backup returns to safe.

Shok

Posted: 3/3/2005 6:40:26 AM EDT

[#2]

MHO,I keep my bolts and barrels that have been run together .
Once mated to each other I don't want different "wear patterns" on either part and really don't if I lucked out and got a super accurrate setup."matched"

Posted: 3/3/2005 7:00:56 AM EDT

[#3]

You can swap them all you want. Swapping bolts only becomes an issue when both the bolt and the barrel have seen extensive use in different weapons.

I would suggest using the new bolt in the new barrel and keeping your old one as backup.

[ARCHIVED THREAD] - New upper, same bolt?

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[ARCHIVED THREAD] - New upper, same bolt?

[ARCHIVED THREAD] - New upper, same bolt?