HK UMP Question
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Thread: HK UMP Question

  1. #1
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    Default HK UMP Question

    If i were to buy a 9mm bolt and barrel kit do i need a 9mm lower or can i use my hk usc 45 lower? Sorry if this has been answered i am fairly new here. BTW havnt shot my ump .45 for a long time and wow that thing is a sledgehammer. I shot this weekend with my new barrel 16" I really enjoy this gun as a carbine! i want to do the 9mm in carbine as well!

  2. #2
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    The USC lower will work with your 9mm barrel and bolt.
    "...but just like every other clone, they are copies of the original and copies are never as good as the original."

  3. #3
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    This is great news, Thank you!

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    Quote Originally Posted by Murlow View Post
    If i were to buy a 9mm bolt and barrel kit do i need a 9mm lower or can i use my hk usc 45 lower? Sorry if this has been answered i am fairly new here. BTW havnt shot my ump .45 for a long time and wow that thing is a sledgehammer. I shot this weekend with my new barrel 16" I really enjoy this gun as a carbine! i want to do the 9mm in carbine as well!
    Miguel & Murlow the magazine won't fit the USC lower. Unless there is some 9mm USC single stack magazine I've never heard of. However any UMP lower will work
    USC = Single stack
    UMP= Double stack

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    Quote Originally Posted by bluegrassstalker View Post
    Miguel & Murlow the magazine won't fit the USC lower. Unless there is some 9mm USC single stack magazine I've never heard of. However any UMP lower will work
    USC = Single stack
    UMP= Double stack
    ah, that's right and there are no single stacked 9mm mags that would fit the USC lower. He's going to have to find an UMP lower.
    bluegrassstalker likes this.

  7. #6
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    Okay so i bought two parts kits. :) Now it is my understanding that the lower and bolt require modification to work in the USC. Is this correct? Am i able to make the mods myself or is it best to send to someone?

    Thanks

  8. #7
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    You need an end mill to mill the UMP bolt carrier. Best to send out.

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