This compensator with light rail fits the HK USP 9 / 40 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.
HK USP COMPACT (HECKLER & KOCH) ALUMINUM MATCH WEIGHT COMPENSATOR – MatchWeight
Kimber Micro 9 ESV 9mm, 3.45 Barrel, Compensator, Two-Tone Finish, 7rd - Impact Guns
Comp Weight™ - HK USP 45 & USP 45 Tactical Compensator
HK USP Match weight information
Mantis X3 - Shooting Performance System
John Wick's Famous HK P30L Pistol: Not Just A Prop - Firearms News
John Wick's Famous HK P30L Pistol: Not Just A Prop - Firearms News
Match Weight - Steel ? With Picatinny Rail - USP Elite 9/.40
HECKLER & KOCH USP / USPC 9MM / .45MM / .40MM MATCH WEIGHT HOLSTER – MatchWeight
Outside the Waistband Kydex Holster- Custom Molded- Made in USA
Dick Jones, Author at Gun Digest