You searched for "upper kit"

Firing pin block spring for all USP, USPC, HK45 and HK45C pistols

Backstrap pin for all VP9, VP40, P30, and HK45 pistols. Also used as insert pin for VP9 and VP40 pistols.

Roll pin for extractor, firing pin, and magazine release for USP, USP Compact, P2000 and P2000sk pistols

Firing pin block (drop safety catch) fits multiple models (see below)

Firing pin spring for USPC, P2000, P30, and HK45C pistols. (see below)