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HK LEM Kit Complete For USP & USP Compact Pistols

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

  • Sub-Type: Conversion Kit
    Origin: German
    MPN: 260204
    Price: $149.95
    In Stock
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    HK LEM Kit Complete For USP & USP Compact Pistols
    HK LEM Kit Complete For USP & USP Compact Pistols
    HK LEM Kit Complete For USP & USP Compact Pistols
    HK LEM Kit Complete For USP & USP Compact Pistols
    HK LEM Kit Complete For USP & USP Compact Pistols
    HK LEM Kit Complete For USP & USP Compact Pistols
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    Product Reviews

    Write your own review


    "Love the new trigger"

    Tim D on 7/5/2012 7:14:23 PM

    Stars Rating:


    Comments and Suggestions: A great buy, I love the new trigger. Just wished there was a diagram or instructions with it. But found the info online. Once you put the kit in once it all makes sense.


    "Not for older USP"

    Joseph Kautz on 5/22/2012 7:00:02 AM

    Stars Rating:


    Comments and Suggestions: My older USP9 built in 1995 wasn't compatible with this kit. Sent the gun to HK for upgrades and the LEM trigger now works fine. Can't fault the kit or HK Parts.net. I should have looked into it further before ordering. I like the trigger and am overall satisfied.


    "HK 45 LEM Conversion"

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

    Stars Rating:


    Comments and Suggestions: 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


    "Received quickly and love it"

    Paul Penny on 6/22/2012 11:18:04 AM

    Stars Rating:


    Comments and Suggestions: Excellent kit with all needed parts for my USPC .45. Took a little extra time to figure out all the positioning tricks first time through, but no problems and the improvement over the V1 trigger is amazing.


    "Great product"

    Edward Houser on 6/29/2012 8:26:51 AM

    Stars Rating:


    Comments and Suggestions: Works great. Was relatively easy to install even with minimal experience with such things. The customer service when i called to ask about my USP model and fit was great as well.


    "love the LEM and HKPARTS.NET"

    Terrance Bratton on 12/14/2013 8:35:53 AM

    Stars Rating:


    Comments and Suggestions: Have ordered over 6 kits from them. Have the install down pack. Their customer service is fantastic. Shipping is almost immediate. Best online store for anything period.


    "Lem conversion"

    Jerry Hazlett on 8/29/2011 10:03:27 PM

    Stars Rating:


    Comments and Suggestions: The kit I received fit the firearm I was working on very well. Once I tested all the springs and experimented a little I read the directions that were posted on the net. They need some work. I also read A few comments on some forums. Don't believe everything you read. The kit is worth the money and the trigger squeeze is incredible. I agree that A competent gunsmith should be the one installing this kit. Safety first folks and good shooting. SFC Jerry


    "LEM is most advanced HK Combat Trigger"

    Frederick Medina on 6/30/2011 9:15:03 PM

    Stars Rating:


    Comments and Suggestions: LEM trigger makes DA/SA and traditional DAO triggers obsolete. If you have always wanted a pistol with the speed and simplicity of a Glock, combined with the superior craftsmanship and accuracy of an HK, get a light LEM trigger kit! As a bonus, LEM allows you to remove the decocking lever allowing higher stright thumb hold, and creating a thinner weapon profile for CCW.


    "LEM Conversion"

    Jan P on 10/16/2013 3:05:44 PM

    Stars Rating:


    Comments and Suggestions: Parts came as stated for both light and heavy LEM. Went with the light, love it, works perfect. Love the reset. No more cumbersome safety/decocker!


    "LEM Trigger"

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

    Stars Rating:


    Comments and Suggestions: The parts fit perfectly. Ordering was easy and shipping was fast.