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HK Universal LEM Kit Complete - HK45, USP, & USPC

SKU: HKP-00316

HK Pistol LEM Conversion Kit.

New just released from HK Germany the "universal" LEM conversion kit for USP, USPC & HK45, HK45C pistols. The New universal LEM kit also fits the recently released HK45C & HK45 Pistols.

This kit will enable you to convert your V1-V10 HK Pistol to the LEM Conversion. Each LEM kit includes all of the parts necessary for the light LEM 4.5-5lb trigger pull. As well as the heavy LEM 7.5-8 lb. trigger pull.

Each kit comes complete in new factory packaging & is factory fresh production direct from HK Germany.

Compatible with:

  • HK USP 9mm
  • HK USP .40
  • HK USP .45
  • HK USP compact 9mm
  • HK USP compact .40 & .357 Sig
  • HK USP compact .45
  • HK USP, USPC & HK45C, HK45 Tactical pistols
  • HK45C
  • HK45

Each LEM kit comes complete with the following LEM parts:

  • Hammer
  • Cocking piece
  • Hammer rebound spring
  • Light trigger return spring
  • Heavy trigger return spring
  • Hammer spring (long) for USP, USPC & HK45
  • Hammer spring (short) for the HK45C
  • Sear
  • Hammer Axle (solid)

Please note: That any pre-2005 production USP Variants will also need the new style catch part number 219442.

USP LEM & HK45 trigger pull weights quick guide:

  • Use the trigger return spring that may be in any newer production HK pistol or HK part # 209266 (black colored, thinner trigger return spring) for light LEM trigger pull, approximately 4-5 lbs.

  • Use the square spring shaped trigger return spring in the kit for the heavier LEM trigger pull, approximately 7-8 lbs.

    Developed especially for a U.S. government agency, the Law Enforcement Modification (or LEM for short), is a unique trigger mechanism created specifically to improve the trigger performance and reduce the weight of the Double-Action Only (DAO) trigger pull in the P2000SK, P2000, USP, USP Compact, HK 45, and HK 45 Compact pistols. With this mechanism, HK pistols can be fired like a standard DAO semi-automatic pistol where every round is fired by simply pulling the trigger fully rearward with the hammer starting at the forward rest position. The design of the propriety HK LEM system allows the weight of the DAO trigger pull to be reduced to a smooth and constant 7.5 - 8.5 pounds because the two-part hammer is pre-cocked every time the slide moves rearward. Or a smooth 4.5- 5.5 pounds if the operator opts for the lighter trigger pull configuration.

    Please note: The LEM kit will not work in the P2000, P2000SK, P30, P30L, VP9 & Mark 23

  • Condition: New
    Origin: German
    Sub-Type: Conversion Kit
    MPN: 260204
    Price: $149.95
    In Stock
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    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
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    Product Reviews

    Write your own review


    James Kraker on 10/16/2011 7:29:52 AMVerified

    Overall Product Rating:

    Ordered on a Saturday, arrived on a Tuesday. Installed with the assistance of a more mechanically adept person than myself and the retro took about 45 minutes. I got the results that I had hoped for and I am very satisfied with both the service and new action of my duty weapon. Thanks.

    "Excellent service!"

    Doug on 8/25/2012 6:07:55 PMVerified

    Overall Product Rating:

    Placed order in the morning, and it shipped the same day! Got my parts a couple of days later. Couldn't be happier. They were as described and installation was a cinch!

    "Outstanding Kit"

    mdhabell on 9/7/2011 3:47:05 PMVerified

    Overall Product Rating:

    Works great in my USPc 40, no additional parts needed. If you are not sure how to install it just Google around until you find a video or a forum post that shows you how, there are several. This one kit gives you 6 different trigger options from the heavier to the feather light, try the different included springs and see what you like best. If you want a light DAO trigger this is the way to go, I highly recommend it.

    "Highly recommended modification."

    Aaron S. on 9/5/2011 10:45:09 AMVerified

    Overall Product Rating:

    I would highly recommend this kit to anyone who either does not like the SA/DA trigger system, would like to get rid of the chunky lever on the side of their gun, or for someone who really prefers a more consistent trigger with a short reset. The installation went well with the instructions on HKPRO (although the pics could be better/larger) the quality of the parts is excellent and the resulting trigger pull is fantastic. I've tried multiple spring configurations to find the one I like and am n... More details

    "Charles R. Lazarus"

    Charles Lazarus on 7/1/2011 1:09:05 PMVerified

    Overall Product Rating:

    All parts came as ordered and ina speedy time, I am very happy with the service & parts.

    "Works great"

    Donald Moore on 8/28/2013 9:16:00 AMVerified

    Overall Product Rating:

    Very easy to install and works great.


    Cesar Melendez on 3/29/2012 5:40:28 PMVerified

    Overall Product Rating:

    Great kit with all parts included to make any changes to your V1 to LEM conversion.

    "LEM Trigger"

    Paul Eppler on 8/28/2013 7:13:33 AMVerified

    Overall Product Rating:

    The parts fit perfectly. Ordering was easy and shipping was fast.

    "HK 45 LEM Conversion"

    Jorge Vazquez on 1/4/2012 12:58:14 AMVerified

    Overall Product Rating:

    I absolutely love the LEM conversion. It literally makes the weapon "caveman" simple to use, which is actually a great advantage, especially for anyone who has ever or could ever be put into a life or death situation. Only downside is that this weapon is now more of a tactical piece instead of a home defense weapon. I say this for anyone who has children. Not having a safety and reducing the trigger pull to 1.5 pounds can lead to tragedies. But if you are military or L.E. then this will truly tu... More details

    "LEM Trigger KIt"

    Robert Pope on 9/26/2013 12:30:48 PMVerified

    Overall Product Rating:

    This has been out of stock forever but I said email me when it's in stock and they did. And I ordered 2 of them....Nice Deal. Thanks.