This compensator fits the HK USP 45 Compact of all barrel lengths. The compensator has a fully open top to accommodate all barrel lengths, due to the fact that the barrel pitches when it is fired. From the standard full size (which achieves the most recoil reduction), to the tactical barrel (which achieves slightly less recoil reduction).
Is the 'match' on the KWA USP Match airsoft gun removable? - Quora
PMM Compensator for HK VP9 - Parker Mountain Machine
Match Weight
UMAREX / KWA USP.45 Match GBB Airsoft
Comp Weight™ - HK USP 45 & USP 45 Tactical Compensator
Match Weight - Compensator w Light Rail - Fits HK USP Compact 45
Match Weight - Compensator - Fits Heckler & Koch - HK USP Compact 45
HK USP 45 Elite
Heckler and Koch CONSIGNED HK USP45 V1 45ACP USP COMPACT FHKI104383 Hand gun - Arnzen Arms
H and K Usp 45 - UK
Match Weight Lara Croft Compensator for USP Compac (EUNKT3PG4) by cynosurex
USP (HECKLER & KOCH) 9MM / .45MM / .40MM MATCH WEIGHT COMPENSATOR – MatchWeight
Heckler Koch Usp 45 - Sweden