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Thread: Century Arms Centurion UC-9

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    Century Arms Centurion UC-9

    Forgive me if I am posting this in the wrong place. However I realize that Century Arms modified SMG parts to be used in their UC-9 semi carbine and since I just acquired a UC-9 reciever I am wondering which semi parts I have to be careful of to try and get this up and running. I am not new to gunsmithing but as you can tell a little green on the Uzi. Any help or direction would be appreciated

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    For one thing go to Mckay enterprises and get a semi bolt, they have them in stock and supposedly they aren't making them anymore.

    Edit: It was the receivers, sorry, semi bolt and firing pin assembly is going to be the hardest to obtain, there are a couple bolts on Gunbroker right now.
    Last edited by kanewtervalve; 01-25-2021 at 11:37 AM.

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    Thanks for the info. I take it that any semi bolt and firing pin assembly will work?

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    The lug on the lower that the pin goes through that holds the lower on the upper on the century’s uppers are 8mm for a SMG. Semi lowers are Drilled to 9mm.
    If it’s 8 mm you’ll have to drill The lug it out to 9 mm or find a sub machine gun lower and my modify it to semi auto only

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    Quote Originally Posted by Ratso View Post
    Thanks for the info. I take it that any semi bolt and firing pin assembly will work?
    From what I understand if you buy a UC9 bolt you will need a UC9 firing pin, don't know why Century did that exactly.

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    Yes my UC-9 receiver has an 8mm ( .313 inch ) grip lug. Should not be a problem to drill it out to 9mm. Thanks. I would like more info about the UC 9 bolt and what makes it different from a IMI semi bolt.

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    Quote Originally Posted by Ratso View Post
    Yes my UC-9 receiver has an 8mm ( .313 inch ) grip lug. Should not be a problem to drill it out to 9mm. Thanks. I would like more info about the UC 9 bolt and what makes it different from a IMI semi bolt.
    If you have an access to a drill press use a drill press because that hole has to be perfect for the pin to slide through to the other side.

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    Is the Century UC9 and Norinco 320 the same gun?

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    Quote Originally Posted by Poacher View Post
    Is the Century UC9 and Norinco 320 the same gun?
    No, the Norinco came in after the Bush import ban, they cut off the bayonet lug and threw a thumbhole stock on it and it was allowed in, after that no more were allowed to be
    imported. I don't know if Century made theirs or had someone else. As far as the lower receiver, you can get a semi converted that still has a 8mm takedown hole and you won't have to do any drilling.

  10. #10
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    The Century arms uppers don’t have a bayonet lug it just long square piece of metal.

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