Uzi barrel bore diameter measurement?

Slowmo

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Has anyone ever slugged an IMI SMG barrel to determine the bore diameter? If so, what did it measure?

Edit: My original question was wrong. I meant to ask about groove diameter, not bore diameter.
 
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amphibian

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I do it all the time for threading barrels. I put a gauge pin in the bore and indicate off of it. I see it vary a lot. I don't really keep track of IMI vs other ones though. Most 9mm barrels (not just UZI) are .347. I did an IMI FS semi barrel recently and it was .345.

You got me curious so I just checked (5) IMI barrels.
1 IMI FS SMG barrel that looks brand new .347
1 IMI FS SMG barrel that is never fired .346
1 IMI Polygonal Mini UZI barrel (not new, I use it) .346
1 IMI Mini UZI compensated barrel (not new, I use it) .347
1 IMI Mini UZI cut down semi barrel (not new, I use it) .347
 
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Slowmo

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I do it all the time for threading barrels. I put a gauge pin in the bore and indicate off of it. I see it vary a lot. I don't really keep track of IMI vs other ones though. Most 9mm barrels (not just UZI) are .347. I did an IMI FS semi barrel recently and it was .345.

You got me curious so I just checked (5) IMI barrels.
1 IMI FS SMG barrel that looks brand new .347
1 IMI FS SMG barrel that is never fired .346
1 IMI Polygonal Mini UZI barrel (not new, I use it) .346
1 IMI Mini UZI compensated barrel (not new, I use it) .347
1 IMI Mini UZI cut down semi barrel (not new, I use it) .347

Thanks for those measurements! Your answer made me realize that I asked the wrong question. It’s the groove diameter that I meant to ask about.

I know there is no shortcut to slugging your own barrel, but I’m curious if they are known to run close to .355” or on the bigger side.
 

K2

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Hi Slowmo,

FWIW, SAAMI says anything from .355" to .359" is AOK. I have slugged earlier 9mm barrels and they ranged from .355 to .361. As you mentioned, no shortcuts here.

Enjoy,

K2
 

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