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Thread: oversized trunion

  1. #1
    Gunco Rookie nhraidersfan's Avatar
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    Default oversized trunion

    Hey everyone, I bought a Bulgarian ak parts kit from Sportsmans guide and when I ordered a barrel from ak builder I tried the fit and it was pretty loose. I measured the trunion to be about .911" and the barrel to be about .908". is this trunion salvageable? or should I look for one someplace? if so anyone have a good source for AKM trunions?

  2. #2
    Always sore, always tired Bradrock's Avatar
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    You just need to knurl the barrel. The trunnion is fine.
    " Save a tree...........Eat A Beaver!"

  3. #3
    GuncoHolic Sprat's Avatar
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    welcome to the site

    this was just discussed the other day
    http://www.gunco.net/forums/f43/roma...trunion-72057/

    I find it is better to go to these sites and do a bit a research first, before starting any build one should research everything they can
    Sprat and sprat1 are one and the same.

  4. #4
    Gunco Rookie nhraidersfan's Avatar
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    thanks guys, guess I'll start stippling

  5. #5
    No Hope For Me 1biggun's Avatar
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    ,003" is really loose , the trunion is oversize if those measurement s are correct . It going to take a lot of stippling .

  6. #6
    Gunco Regular akblue's Avatar
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    The knurling tool in the other post will in all liklihood create a very good interference fit.
    While I have used hand knurling with a punch for diameter increase., the larger the diameter difference the more effective the full coverage knurling tool helps to achieve a concentric interference fit. Not too expensive and I found with the current USA barrel builds it is a really handy tool for undersized journals or oversized component fit..

  7. #7
    Gunco Member vinco's Avatar
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    So, did you get one of the "new" kits from Sportsman's Guide? I really should have spent the extra money and gotten the "new" kits instead of the "used" kits that I got, as the "used" kits I received didn't have trunnions at all! I guess that's really the difference in the kits they were offering, because all the parts I did receive in the "used" kits look pretty much brand new.

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