The HK USP is probably the most reliable handgun.
It could be, HK makes really nice guns.
I did have an HK-4 which jammed around ever other round. It had both .32 and .22LR barrels. You reversed the breech with the supplied screwdriver when changing between rimfire and centerfire.
It was also available with .380 and .25 barrels. I have no idea why anyone would get the .25.
The gun was based on the Mauser HSc and had a good reputation but mine was awful.
“The HK USP is probably the most reliable handgun.”
I evolved from a Glock, to Sig, to the USP. No complaints.