Individual LEM Part Numbers

A few members have asked me to post the individual parts and their associated part numbers for the LEM and Match LEM Hybrid triggers, so here they are.

Note
• Parts can be purchased from HK Customer Service (706-568-1906), Brownells, MidwestGunWorks, EuroOptic, TopGunSupply, Numrich, and HKParts
• It is more cost effective to purchase the whole LEM kit (for USP/USPc/HK45/HK45C) than to buy individual LEM parts
• LEM with different trigger pull weights can be achieved by using different combinations of TRS, HS, and FPBS. See this LEM Springs Reference Chart for more information.
• Some of the part numbers may have been changed by HK by adding a "50" prefix to the old part #. For example, part 219439 is now 50219439.

Abbreviations
FP = Firing Pin
FPS = Firing Pin Spring
FPBS = Firing Pin Block Spring
HS = Hammer Spring
TBDS = Trigger Bar Detent Spring
TRS = Trigger Rebound Spring
DA = Double Action
SA = Single Action
LEM = Law Enforcement Modification (aka Combat Defence Action or CDA outside of the U.S.)


For USP/USPc/HK45/HK45T/HK45C/HK45CT
Required LEM Parts
1. Sear (50219439 or 219439)
2. Cocking Piece (50219443 or 219443)
3. Bobbed Hammer (50219452 or 219452)
4. Hammer Axle (50214258 or 214258)
5. Cocking Piece Spring (50219444 or 219444)
11. Catch (50219442 or 219442) <-- only for early 2005 (AF) or earlier date code


Light LEM Variant:
• Keep your V1 (DA/SA) TRS
• Keep your V1 (DA/SA) HS
• Keep your V1 (DA/SA) FPBS

Heavy LEM Variant:
7. Heavy TRS (50219441 or 219441)
8. Heavy HS - HK45C/HK45CT only - shorter spring (234460)
9. Heavy HS - USP/USPc/HK45/HK45T - longer spring (50214695 or 214695)
10. Heavy FPBS - (209962) <-- For USP/USPc only



For P2000/P2000SK
Required LEM Parts
1. Release Catch - aka Sear (209320)
2. Cocking Piece (209265)
3. Bobbed Hammer (209321) <-- not applicable if you are converting to V4.1 LEM
4. Cocking Piece Spring (209275)
9. Sear Actuator Latch aka Control Lever (209274)


V0 LEM Variant:
This is LEM variant with spurred hammer and decocker. Available only outside of the U.S.

• LEM Spurred Hammer (209262, pictured below)
• You will not need parts 1 and 3 (LEM Sear/LEM Hammer)
• Keep your V3 Sear (with decocker)
• Keep your V3 HS and TRS (part #6)
• For P2000SK - Keep your V3 HS (207122)
5. Light FPBS (50209296 or 209296)



Light LEM (V1 LEM) Variant:
5. Light FPBS (209296)
• Keep your V3 HS and TRS (Part #6)

Heavy LEM (V2 LEM) Variant:
7. Heavy Elbow Spring for Trigger - aka Heavy TRS (50219441 or 219441)
8. Heavy HS (50214695 or 214695) <-- for P2000 only
• Keep your V3 FPBS (206962)

V4.1CH LEM Variant:
6. Light TRS (209266)
10. V4.1 LEM Hammer (207934)
11. V4.1 TBDS (207932)
12. V4.1 Catch (207933)
• You will not need the standard LEM Hammer (part #3)
• Keep your V3 FPBS (209962)



For P30/P30S/P30L/P30LS/P30SK/P30SKS
Required LEM parts
1. Release Catch - aka Sear (209320)
2. Cocking Piece (209265)
3. Bobbed Hammer (209321) <-- not applicable if you are converting to V4.1 LEM
4. Cocking Piece Spring (209275)
8. Heavy LEM HS (50214695 or 214695) <-- not applicable on a P30SK/P30SKS
10. Sear Actuator Latch aka Control Lever (209274) <-- not applicable on an S model (e.g.: P30S, P30LS, or P30SKS)


V0 LEM Variant:
This is LEM variant with spurred hammer and decocker. Available only outside of the U.S.

• LEM Spurred Hammer (209262, pictured below)
• You will not need parts 1 and 3 (LEM Sear/LEM Hammer)
• Keep your V3 TRS (234389)
• Keep your V3 Sear (with decocker)
• Keep your V3 FPBS (209962)
• For P30SK/P30SKS - Keep your V3 HS (207122)



Light LEM (V1 LEM) Variant:
6. Keep your V3 TRS (234389)
• Keep your V3 FPBS (209962)
• For P30SK/P30SKS - Keep your V3 HS (207122)

Heavy LEM (V2 LEM) Variant:
7. Heavy Elbow Spring for Trigger - aka Heavy TRS (234405)
• Keep your V3 FPBS (209962)
• For P30SK/P30SKS - Keep your V3 HS (207122)

V4.1CH LEM Variant:
9. Medium TRS (234773) or keep your V3 TRS. The stock V3 TRS gives you a lighter trigger pull.
11. V4.1 LEM Hammer (207934)
12. V4.1 TBDS (207932)
13. V4.1 Catch (207933)
• You will not need the standard LEM Hammer (part #3)
• Keep your V3 FPBS (209962)
• For P30SK/P30SKS - Keep your V3 HS (207122)

If you want to lighten the final trigger pull weight by an additional 1/2 to 1 lb, you will need the Light FPBS (part #5 - 50209296 or 209296).

Note
All LEM variants use the same V3 (DA/SA) Hammer Axle (for P30/P30L/P30SK) OR V3 Ambi Safety Lever and V3 Control Lever (for P30S/P30LS/P30SKS).



Match + LEM Hybrid
Required Parts
1. Match Trigger (215684)
2. Overtravel Stop Screw (215680)
3. Hex Wrench (958179)
4. Light TRS (209266) <-- Factory Match LEM Hybrid trigger uses the Light TRS for a more positive reset
5. Match Hammer Spring (215694)
6. Match Nickel-Plated Flat Sear Spring (215691)
7. Catch (50219442 or 219442) <-- only for early 2005 (AF) or earlier date code
8. LEM Sear (50219439 or 219439)
9. LEM Bobbed Hammer (50219452 or 219452)
10. LEM Cocking Piece (50219443 or 219443)
11. LEM Cocking Piece Spring (50219444 or 219444)
12. LEM Hammer Axle (50214258 or 214258)

Notes
• If you have an HK45, you already have part #7, and may not need parts #5 and #6. Double check to make sure your gun comes with parts #5 and #6 from factory; some do, some do not. Many recent models (BC date code and later) no longer come with parts #5 and #6 from factory. If your hammer spring is painted Blue, it is not the Match hammer spring.

• If you have an HK45 Compact, you already have part #7, and may not need part #6. Double check to make sure your HK45c comes with part #6 from factory; some do, some don't. Many recent models (BC date code and later) no longer come with part #6 from factory. Part #5 must be cut to size to fit.

• If you have an HK45, HK45 Compact, or USP Compact, you will not be able to use the Match Trigger assembly (part #1). The stock trigger can be drilled and tapped for the overtravel stop screw, or the Match trigger must be modified to fit the smaller trigger guard. The USP Compact models have very little overtravel room in the trigger guard area so a stop screw may not be needed at all.



Match + LEM Hybrid (from factory LEM)
If you have a factory LEM and want to convert it to a Match LEM Hybrid trigger, all you need are some of the Match Trigger parts.

See Notes above regarding the Match trigger if you have an HK45, HK45 Compact, or USP Compact.

Required Parts
1. Match Trigger (215684)
2. Overtravel Stop Screw (215680)
3. Hex Wrench (958179)
4. Light TRS (209266)
5. Match Hammer Spring (215694)
6. Match Nickel-Plated Flat Sear Spring (215691)





Match + LEM Hybrid (from factory Match)
If your pistol comes with a Match Trigger from factory (Expert, Elite, Match, or Tactical but not USP9SD or Compact Tacticals) and you want to convert it to a Match LEM Hybrid trigger, all you need are some of the LEM parts.

Required Parts
1. LEM Sear (50219439 or 219439)
2. LEM Cocking Piece (50219443 or 219443)
3. LEM Hammer (50219452 or 219452)
4. LEM Hammer Axle (50214258 or 214258)
5. LEM Cocking Piece Spring (50219444 or 219444)
6. Light TRS (209266)
7. Catch (50219442 or 219442) <-- only for early 2005 (AF) or earlier date code



Note
• If your USP Tactical (40/45) date code is AF to BB, double check to make sure if yours already has the Match HS (part #8) and Match Nickel-Plated Flat Sear Spring (part #9). Note that the USP Tactical 9mm is not listed here because it did not exist until late in 2014 (BE) and only became available to the general public in 2015

• If your USP Tactical (40/45) date code is BB or later, or if you have a USP Tactical 9mm (but not USP9SD) you will need these Match parts:
8. Match HS (215694)
9. Nickel-Plated Flat Sear Spring (215691)