HK Pistol Parts
- Accessories
- Magazines
HK VP
- HK VP9
- HK VP9SK
- HK VP40
MP5
- HK 94
- MP5 SD
- MP5 Clones
HK .22lr Rifles
- HK MP5
- HK 416
- GSG522
MP5K
- SP89, MP5K-N
- HK SP5K
MP5 40
- MP5 10
- MP5 .357
B&T
- Brugger & Thomet
HK 91
- HK G3
- PTR 91
- CETME, C308
- G3K, PTR PDW
HK 93
- HK 33
- HK 53
- Vector Arms V53 V93
- C93
HK MR556
- HK 416
- HK 416A5
- HK CR556
HK MR762
- HK 417
- HK MR762 LR
HK G36
- HK G36K
- HK G36C
- HK SL8
HK USC Carbine
- HK UMP 45
- HK UMP 40
- HK UMP 9mm
PSG1
- MSG90
HK 21
- HK 21E
- HK 23E
- HK 11
HK MP7, MP7A1
HK Apparel
- Shirts
- Hats
HK Aficionado
- Posters
- Stickers
- Calendars
HK Knives
- Benchmade
HK 300
- HK G41
- HK SL6
Recently Added Products
Pre-owned HK Products
Glock Magazines
AR-15, AK-47, Glock Parts
Clipped & Pinned Services
Emergency Preparedness
Browse Catalog
Gift Certificates

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
    Save to my Wish List
    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
    (Click to see larger image and other views)
    Previous Item   Next Item
    Related Items Others Found Useful.
    Check the check boxes next to the additional products that you would like to add to the shopping cart, then click on the "Add to Cart" button above. A check box is not shown if a product requires that you select an option or fill out a field. () indicates a required accessory.

    Product Reviews

    Write your own review


    "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.


    "Excellent kit"

    Eric C on 9/12/2013 8:08:36 AMVerified

    Overall Product Rating:


    The kit was of excellent quality. It installed easily and works flawlessly. The reset is better and shorter than I imagined it would be and the trigger break is good. After firing 200 rounds and dry firing with snap caps, the trigger is getting better.


    "LEM trigger install"

    Peter Tanner on 5/11/2012 8:54:25 AMVerified

    Overall Product Rating:


    Easy to install takes about 30 minutes, but you have to watch the youtube video, this kit does not have installation instructions. High quality as with everything I have purchased from HK parts..


    "Lem Parts kit HK 45C"

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

    Overall Product Rating:


    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.


    "Best mod for the usp"

    Matthew Reilly on 12/8/2011 12:14:32 PMVerified

    Overall Product Rating:


    This has to be one of the best mods you can make to your USP pistol, especially if you carry it as a duty gun. My trigger pull is now around 4 pounds and shorter trigger reset. If you want a safety on your gun just order the 5-6 detent plate and there ya go. This made me fall in love with my USP all over again. I have about 1000 rounds through my gun since the install and not a single malfunction. Worst thing about the USP 45 is the worthless mag springs. I replace mine every couple of years to ... More details


    "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!!!


    "LEM Conversion Kit USP Series Pistol"

    Gary Shiroda on 1/28/2011 8:09:04 AM

    Overall Product Rating:


    Purchased & installed 1st kit for USP 45 Compact, worked so well it's a "must have" for my USP 45 Tactical! Order placed today!!!!


    "Sig LRM Trigger Kit"

    Robert Sheppard on 1/10/2012 1:20:34 AMVerified

    Overall Product Rating:


    Product is just what is advertised. Nice clean 4.8-5.4 pound pulls I will be installing this kit in future.


    "LEM is most advanced HK Combat Trigger"

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

    Overall Product Rating:


    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.


    "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.