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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

    "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!!!!

    "Best upgrade for a v1 USP"

    Paul Penny on 7/7/2012 7:58:48 AMVerified

    Overall Product Rating:

    Incredible improvement IMHO over the v1 trigger on my USPc .45. I retained the OEM trigger return spring and hammer spring for a "light LEM" configuration. Measures 1.25 lbs first stage/take-up, 5.0 lbs second stage/break. Love this on my carry USP.

    "Like to Love"

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

    Overall Product Rating:

    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.

    "Love the new trigger"

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

    Overall Product Rating:

    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.

    "Great service"

    walter b kulecz on 1/27/2012 10:26:57 AM

    Overall Product Rating:

    Great service, but they forgot to mention it won't work with the "older" USP models with the one-piece catch. They were very efficient at canceling my order when I learned this shortly after placing it. It'd be nice is they mentioned this under the "more details" section. I'm disappointed, but satisfied and won't hesitate to use next time I need 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.

    "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.

    "LEM kit- Awesome"

    Mike W on 1/25/2012 7:12:13 AMVerified

    Overall Product Rating:

    Items shipped fast. Easy install, except for the TRS, so I stuck with the original. Note: If you want to retain the safety with the LEM upgrade, you do not need the variant 5 tube, but you will want the variant 5/6 detent plate.


    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!!!

    "LEM trigger"

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

    Overall Product Rating:

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