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Thread: USPc conversions...

  1. #1
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    blacksheep40's Avatar
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    Default USPc conversions...

    i know .40 and .357 barrels are interchangable in a USPc... but what other configuration can i get out of my .40? i highly doubt a .45 slide/barrel would fit but its worth asking.
    let the flogging begin

  2. #2
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    40 and 357 are it.

    EDIT: I guess I stand corrected.
    Last edited by F-Trooper05; 01-28-2011 at 07:24 AM.
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  3. #3
    Unrepentant HKHolic
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    I believe EFK makes a 9mm conversion barrel for the 40.
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  4. #4
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    not a big 9mm fan but it sure is cheap to shoot. will the .40/.357 mags work or do i need 9mm mags? thanks for the responses guys, i was expecting to get flogged for this one

  5. #5
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    They will actually feed 9mm OK, but the bullet comes up further in the feed lips and I would worry about the lips spreading over time. I'd get a 9mm mag to go with the barrel, if you go that route.

  6. #6
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    i will likely get both .357 sig and 9mm barrels then, its nice to have a multi gun for when there is another ammo shortage and i have to go hunting for ammo

  7. #7
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    Grrr. should have gotten the .40 USPc... (I have USPc 9). I slightly regret getting 9mm for various reasons.

    BTW....9mm is cheaper to get mags for too. 9mm 10 rounders are 20 bucks at cdnn. Really brings down the cost of training.

  8. #8
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    Don't be surprised with that 9mm conversion barrel starts malfunctioning though. Most do after a while. When the extractor is sharp it works ok but as the extractor dulls from trying to remove an undersized case head from the sloppy fitting oversized bolt face the extractor starts slipping the rim. So, go for it if you want but don't be surprised when you need a new extractor in a few thousand rounds and your reliable HK has become a jam-o-matic.
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  9. #9
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    i hadnt thought of that... maybe i will scrap the 9mm idea and stick with manly rounds... jk. once again, thanks for the replys

  10. #10
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    Quote Originally Posted by blacksheep40 View Post
    ...i highly doubt a .45 slide/barrel would fit but its worth asking...
    A USPc .45ACP slide will not work on a USPc .40S&W because the frames are different.

    I sometimes use a .357SIG conversion barrel in my USPc .40. It's the only conversion I know of for the USPc that will work as well as the stock .40S&W barrel. Also uses the same .40S&W magazines.

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