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Use old bolt with new barrel?

  1. Hey guys,
    I found an ar upper with really high round count (25k or so through it) and i wanted to put in a new barrel. The bcg and bolt look good- would it okay to just use the same bolt with the new barrel, or should everything be changed out?

    Also is checking headspace absolutely necessary or just a good idea?

  2. I prefer to keep bolts with barrels.
    Last barrel I replaced, I bought a new bolt.

    Checking headspace isn’t necessary, IF, you are using quality, trusted components.
  3. ^^This^^

    I do it all the time - including old bolts in barrels with some miles - but......c-above.

    Also, BCG = Bolt Carrier Group. Which includes the bolt, among other things.