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Thread: Should I replace the FSB pins?

  1. #1
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    Should I replace the FSB pins?

    I bought a Colt barrel assembly from Clyde armory (one of the ones used in an armorers course) and while inspecting it I noticed the FSB pins weren't drove in the whole way. This has got me thinking that the FSB was likely removed multiple times during the courses and I wanted to know if it would be a good idea to get some new pins. I'm planning on replacing the barrel nut as it is (the teeth are really chewed up), so I wanted to ask if replacing the pins would be a good idea.

  2. #2
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    The Colt pins will sometimes not be flush with the FSB due to the taper. If the larger side is not flush it is less of an issue than the smaller side. If you can see raw metal exposed on the FSB on the small side your pins are either the wrong ones or too short.

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    The pins are barely in. I was able to tap one out with very little force.

  4. #4
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    I would say the FSB pin channels are reamed out. Even new pins may not fit tight.

    You can go with a FSB that uses screws or have a new one drilled by a gunsmith.
    Last edited by MK18; 11-23-11 at 01:53.

  5. #5
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    I should have clarified. The pins weren't driven all the way in and I wasn't going to try until I replace the barrel nut so I have no idea how tight these pins fit. I was just curious if it might be a good idea to install new pins since I have to pull the FSB anyway.

  6. #6
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    Use what you got. If they fit tight, good. If not, you may have other problems. I think someone just left the pins loose for whatever reason
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  7. #7
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    They should fit ****ing tight, Jack! It is a bitch to knock factory Colt pins out.

    If they're not damaged on the ends, they're fine. Replace the nut with a REAL COLT part. Then hit the pins back in with a good punch that has the concave tip.
    "You people have too much time on your hands." - scottryan

  8. #8
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    Quote Originally Posted by markm View Post
    They should fit ****ing tight, Jack! It is a bitch to knock factory Colt pins out.

    If they're not damaged on the ends, they're fine. Replace the nut with a REAL COLT part. Then hit the pins back in with a good punch that has the concave tip.
    The ends of the pins look fine. At any rate the barrel will be going to Adco at some point so I guess they'll be able to see if anythings wrong. Thanks for the advice everyone.

  9. #9
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    Quote Originally Posted by SoDak View Post
    I bought a Colt barrel assembly from Clyde armory (one of the ones used in an armorers course) and while inspecting it I noticed the FSB pins weren't drove in the whole way. This has got me thinking that the FSB was likely removed multiple times during the courses and I wanted to know if it would be a good idea to get some new pins. I'm planning on replacing the barrel nut as it is (the teeth are really chewed up), so I wanted to ask if replacing the pins would be a good idea.

    I would have never bought one of these barrels for the price they were selling them for.

    You could have bought a new barrel for just a bit more.

    IMHO, these barrels are worth $100 or less.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  10. #10
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    The pins are most likely not fully hammered in because they want to make it easier for the end user to initially remove the pins in case the user wants to install free-float rails.
    Last edited by justin_247; 12-02-11 at 08:42.

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