I have an older 22/45 that has been flawless, yet it stays at home most of the time.

Wouldn't mind a Buckmark

Cz Kadet kit on my cz P01 is pretty legit. It gets pissy if you don't clean it every 1500 rounds or so

I have a marvels unit one. Was a pissy SOB for a few thousand rounds. Then it settled in. Very accurate,, has seen nothing but Aguila and blazer ammo. Needs cleaned every 500 rounds or so to keep running. A red dot and 16 round mags made it even better. By far my most shot rimfire, these days