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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
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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


    "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


    "Great trigger"

    Donald Merchant on 3/1/2012 9:55:55 AM

    Stars Rating:


    Comments and Suggestions: Great trigger! Note that if your HK is pre 2005 your existing catch won't work and the hammer will contact the firing pin if bumped. Travis at HK (706)568-1906 sent me the correct catch at no charge. They stopped including the catch in the kit because most people had newer guns and did not need it.


    "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.


    "LEM trigger"

    eric on 7/9/2012 4:43:39 PM

    Stars Rating:


    Comments and Suggestions: great improvement, liked it better than SA/DA trigger, not spongy, safety lever not in the way, can shoot tighter groups.


    "Like to Love"

    Mark Leso on 12/8/2011 7:44:12 AM

    Stars Rating:


    Comments and Suggestions: Changed from a V1 to LEM (light). Loved the trigger immediately and highly recommend it. Went from "like" to "love" for shooting my HKUSP9C. The (light) kit installed easily with just 2 punches and a pick.


    "Lem Parts kit HK 45C"

    Jim B on 2/22/2012 6:24:28 AM

    Stars Rating:


    Comments and Suggestions: Parts kit worked great. Everything you need to make the switch. It took about a half hour while making dinner to install. Only wish it had some instructions included but these can be found online.


    "Lem trigger upgrade"

    Anthony on 4/23/2012 7:56:33 PM

    Stars Rating:


    Comments and Suggestions: Wow the s/a trigger pull is smooth and d/a is a great improvement in accuracy.


    "Great kit"

    Paul B. on 6/22/2014 8:03:39 AM

    Stars Rating:


    Comments and Suggestions: Great kit easy to install (good videos online to walk you through). Fast shipping.


    "LEM kit for USPc 9mm"

    Mehmet Gerceker on 10/10/2011 2:33:07 PM

    Stars Rating:


    Comments and Suggestions: The kit is complete except for instructions on how to install it. If you have that part under control you probably will love it.


    "Sweet"

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

    Stars Rating:


    Comments and Suggestions: Great kit with all parts included to make any changes to your V1 to LEM conversion.