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Old June 9, 2019, 04:27 PM   #12
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Join Date: October 29, 2011
Posts: 1,739
This link has HK spring chart which may help. Personally I would first change hammer spring to lighter 12LB, then change FPBS to lighter version, and if you still want lighter then change trigger return spring also to lighter which would make it V1 light LEM.
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