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USP: changing LEM to DA/SA. Easy? Cheap?

Discussion in 'Heckler & Koch Forum' started by Henry's Dad, Nov 17, 2012.

  1. Henry's Dad

    Henry's Dad woof, woof

    If one were to purchase a USP with an LEM trigger, how easy is it to swap in a DA/SA trigger configuration? I'm interested in both the price of such a mod and technical ability needed (ie, can your average guy do it, or is a 'smith-only job?).

  2. majette


    May 1, 2008
    Norfolk, VA
    it is not too hard if you have average ability. i would suggest learning the lem trigger, it is head and shoulders above the da/sa. think of it as a light sa with a long intitial/first shot takeup. here is a video i did explaining the lem trigger:

    [ame=""]Quick BLACTICAL Training on the HK LEM Trigger - YouTube[/ame]

  3. barth

    barth six barrels

    Oct 7, 2011
    The Free Zone
    I'd get some serious range time in with the LEM.
    And see if it doesn't win you over.

    It's hard to get the conversion kits from DA/SA to LEM.
    And some LEM models.
    As that's what lots of folks want these days.

    I have four LEM guns myself and wouldn't have them any other way.
    Actually bought a HK45C DA/SA and a LEM conversion kit.
    Because I couldn't find anyone with a HK45C LEM in stock.

    If you are dead set on converting back to DA/SA?
    It's a handful of parts you can buy separate.
    There's instruction and information on HKPRO
    Last edited: Nov 17, 2012
  4. Henry's Dad

    Henry's Dad woof, woof

    Thanks both for the info. LEM doesn't look like a bad option at all.

    My main reason for asking was that I'll likely be buying used, and wanted to jump at a good deal if it came along and not have to worry which trigger it had.

    Thanks again!
  5. cowboy1964


    Sep 4, 2009
    Do you mean a light DA? SA should be lighter than LEM. HK SA is typically around 4.5 or 5#, no?
    Last edited: Nov 17, 2012
  6. Henry's Dad

    Henry's Dad woof, woof

    Another couple of questions on mods:

    (1) is it possible/easy to switch a decocking/safety lever from one side to the other (with an aftermarket part, I assume).

    (2) can you install a decocking/safety lever on a gun that didn't come with one (var 7)?

    Thanks again.
  7. H&K 4 LIFE

    H&K 4 LIFE Leonum A Ignis

    Jan 27, 2009
    1. It is easy to switch the location of the control lever on a USP. Odd number variants are for right handed shooters (control lever left side of frame) and even number variants are for left handed shooters (control lever right side of frame).

    For example, a V1 is DA/SA with safety and decocker control lever left side of frame, while a V2 is DA/SA with safety and decocker control lever right side of frame.

    No aftermarket parts are required, as HK makes the necessary control levers themselves. The new control lever that corresponds to what side you wish to install it on is all that is required to move it's location. Furthermore, there are ambidextrous control levers available.

    2. You can convert the pistol to LEM and still retain the control lever as a manual safety. Decocker function is not required with the LEM trigger.

    The USP is still the most flexible HK pistol when it comes to trigger variants.
    Last edited: Nov 18, 2012
  8. Spiffums

    Spiffums I.C.P.

    Sep 30, 2006
    And a 3rd hand REALLY HELPS! :rofl: I lost my spring so many times when putting the LEM in.
  9. majette


    May 1, 2008
    Norfolk, VA
    no, since the sa has a defined, light break point, it is different. the first shot has a light take up to the break point because the trigger is pre-cocked by chambering a round or racking the slide. the da only comes into play if the trigger is pulled for a second strike or dry firing without racking the slide to pre-cock the trigger.