The HK USP Compact holds a very special place in my heart. It was the first handgun I ever had and for the first five years, I shot the crap out of that gun. I think there's always a special place in your heart for the first gun type you own.
P2000 USP Compact : r/HecklerKoch
Heckler & Koch USP - Wikipedia
HK USP Expert 9mm 15 Round OD Green / Spartan Bronze - Omaha Outdoors
HK USP9 Tactical -The Firearm Blog
HK USP Compact Vs. Springfield Armory Hellcat Pro - The Mag Life
20 Round Magazine - HK USP 9mm & USP 9mm Tactical
H&K's USP Tactical Pistol Trio An Official Journal Of The NRA
Gun Review: Heckler Koch USP Compact 9mm -The Firearm Blog
H&K USP 45 Compact Questions
Review: Heckler & Koch USP — Universal Self-Loading Pistol - The Shooter's Log