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Discussion Starter #1
Wish me luck..any tips or tricks? Seen the vids and PDF. I've built 2 AR's. So I should be able to do this!
 

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When you are changing the trigger spring, remember the pin only goes in and out one way. Have patience with the spring itself... It can be frustrating without the USP trigger spring tool.
 

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Do NOT change the trigger rebound spring. At least not now. Don't change the hammer (main) spring either unless you want 9 pounds of trigger weight.

I'm not certain if the V1 trigger rebound spring is lighter or heavier than the Light LEM trigger spring but know for sure the flat section LEM spring is a beast.

-- Chuck
 

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Good luck...You can do it!

Use a vice if you can.
Cover any duct vents in the floor - if you have them - springs tend to fly! :)
 

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Discussion Starter #6
Do NOT change the trigger rebound spring. At least not now. Don't change the hammer (main) spring either unless you want 9 pounds of trigger weight.

I'm not certain if the V1 trigger rebound spring is lighter or heavier than the Light LEM trigger spring but know for sure the flat section LEM spring is a beast.

-- Chuck
Talked to Bigbore and TooSixy and both said not to change either and I should like the outcome!
 

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I own three (3) HK LEM pistols. My USP9C was self-converted from V1 to LEM with an early parts kit. My kitchen table. Big Bore's photo essay. Was horrible!

Same 9+ pound trigger she had in the DA part of DA/SA. I guess that's why LEM is marketed to police departments as "DAO." A quick review of the parts diagram in the manual (RTFM?) indicated there were "Light LEM" parts available. All are springs and HK shipped them to me promptly. My HK45C and P2000 were both factory Heavy LEM but by that time I knew how to change the springs.

-- Chuck
 

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Discussion Starter #8
Convert Done! Took me about 40 minutes. All in all pretty easy to do, just took my time. Used the HK pdf in the reference section and Careras(sp?) video as guide. Kept the stock trs and hammer spring. Love the the new feel of the trigger, almost feels like a little kids toy gun for lack of better terms! Well one down two to go...
 

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Discussion Starter #10
Didn't think about it. Converting my other 2 USP's next week. Will try it.
 
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