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Thread: Suppressor Discussion for HK 9mm Guns

  1. #21
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    The concept is that the smooth thread protector mimics the un-threaded 3 lug bbl, so there is no wobble (knurled protector off) and no abrasion like there could be from from a knurled protector kept on. Although some keep the knurled protector on when using a 3 lug suppressor without issue. The first part of this thread has some discussion about it.

  2. #22
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    back in the day, when S&H and others were working furiously to get as many HK sears made and registered before May 19, 1986 most of the cut down HK94 guns (MP5 conversions) had cut down 94 barrels which were threaded and "fake" three lugs were installed. In the late 80s and into the 90s, there were manufacturers and dealers recommending not to acquire suppressors that attached on those three lugs as they might work the fake three lug threads loose. Back then everyone thought swapping a HK barrel was a big expense and it was easier (cheaper) to turn down and thread the portion forward of the three lug and go with a threaded can. Back then there was a large variance between the precision and lockup of different manufacturers three lug cans vs whichever manufacturers fake three lug on the gun especially where being concentric to the barrel was the utmost concern. Lots of folks were happy to go threaded since it got the best concentricity back then before three lugs tolerances tightened up. Seems like today if a can manufacturer is splitting hairs over knurled protector vs smooth protector perhaps they should simply include one with every can out the door.

  3. #23
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    Quote Originally Posted by r View Post
    back in the day, when S&H and others were working furiously to get as many HK sears made and registered before May 19, 1986 most of the cut down HK94 guns (MP5 conversions) had cut down 94 barrels which were threaded and "fake" three lugs were installed.
    I had 3 S&H guns and all just had cut down BBLS. None were even threaded.
    NFA Firearms: In A World Of Compromise, Some Don't.

  4. #24
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    mine was cut and threaded with a fake 3 lug. To my knowledge Curtis did his that way. after he and Tom split things may have changed. When Tom moved to Berryville, AR Tom cut and threaded mine on the front of the fake 3 lug. He still had his HK jig, so he could spin HK receivers on the lathe. I drove up and he did it while we chatted about NFA stuff.

  5. #25
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    Suppressors finally cleared after nearly 1 year. Really like the modularity of moving them back and forth between HK pistols and subguns - threads, 3 lug etc. Needed or not the smooth protector works slick with the 3 lug on the MP5K. Now to get to the range...






  6. #26
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    HK 9mm - A 3-lug is def the way to go...

    My 3-lug cans in order of preference:
    Gemtech MK9K w/3lug
    Bowers Vers-9s w/3lug
    Liberty Infinity w/3-lug (this is a Multimount knock-off in Ti)
    Gemtech Multimount w/3lug

  7. #27
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    Quote Originally Posted by mattnh View Post
    HK 9mm - A 3-lug is def the way to go...
    Agreed - who needs threads on an HK 3 lug bbl subgun? But nearly all of mine are threaded 1/2 x 32. I have the MK9K too and like it. Now my favorite is the little Omega9K esp on the PDWs.


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    Name:  hkmp5a3.jpg
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    Here's what I'm still running. An old three-lugged AWC TAC NINE. It works decently and is very heavy duty. I never thought about using a smooth thread protector. I just slip it over the knurled one that is on the barrel. I don't feel any kind of resistance or scraping. I just have to make sure it's mounted correctly.
    Last edited by maschinenpistole; 07-24-2019 at 02:24 AM.

  9. #29
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    Mine came with silencers on them from the factory.


  10. #30
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    Finally went to a range while on vacation (Page, AZ) and tried out the Silencerco with the P30 - nice!! Really like the right hand thread...





    Quote Originally Posted by nuge View Post
    Suppressors finally cleared after nearly 1 year. Really like the modularity of moving them back and forth between HK pistols and subguns - threads, 3 lug etc. Needed or not the smooth protector works slick with the 3 lug on the MP5K. Now to get to the range...


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