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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

  • Condition: New
    Origin: German
    Sub-Type: Conversion Kit
    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 LEM and HKPARTS.NET"

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

    Overall Product Rating:

    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 trigger upgrade"

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

    Overall Product Rating:

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

    "Great enhancement"

    Robert Del Toro on 8/13/2012 8:38:20 AMVerified

    Overall Product Rating:

    Worth every penny converted my USP 9 Variant 7, to the LEM trigger, went from 12-13 lb trigger to 4.5, great for follow up shots!!!


    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.

    "Quick response"

    houng soo on 10/19/2013 4:23:30 PMVerified

    Overall Product Rating:

    Ordered this and hammer strut and spring on Friday...received Monday afternoon. great service!

    "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


    Brian Kring on 1/22/2012 5:45:33 PMVerified

    Overall Product Rating:

    The conversion\upgrade went on my USP 45c V-1,s all what it's advertised to be...what a big differance!.The folks at HKPARTS.NET's customer service are "Great" also, I had a question concerning the sear-'catch',they were honest and forthright: informing me my model year should have the right catch already installed. Good People!!!

    "Best upgrade"

    craig freter on 12/1/2011 9:09:10 PMVerified

    Overall Product Rating:

    I installed on my USP compact 357 sig. The LEM makes the tigger like a Glock, only better. Very smooth take up, then light clean break. Able to ride the reset like a Glock.

    "Great kit"

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

    Overall Product Rating:

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

    "LEM Conversion"

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

    Overall Product Rating:

    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!