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Discussion Starter · #1 ·
I have two usp's dated 2000 and 2001. I am wanting to do the lem upgrade to both. I know I need the new style catch. I was reading that I need a trigger rebound spring as well? Anything else needed for the upgrade?
 

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You only need the new TRS if you plan to convert to Light LEM. If you buy the Universal LEM kit from HKParts, it will come with one Heavy LEM and one Light LEM TRS. That's what I got with mine and Adam confirmed it in an email exchange.

Not sure about the TGS kit.
 
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