Light LEM spring
HK Trigger Rebound Spring , this OEM HK part is designed to fit H&K USP/USP Compact, P200/P2000SK and HK45/HK45 Compact pistol models chambered in either .45 ACP, 9mm, .40 S&W or .357 SIG. This LEM light trigger rebound spring (TRS) sends the trigger back to battery as the trigger finger is released. This spring is lighter than a standard non-LEM stock TRS.