We all talk about the best we have owned or shot.
How about the stinkers we dumped as soon as possible?
Shotgun: Had a JC Higgins 410 bolt action that fired when moving the safety in any direction.
Revolver: Had a Dan Wesson (yeah I know) 22 mag that would never let you eject the brass without driving each one out with a punch. Sorta ties with a weird west german cheapo revolver (Artmesis?) I had that would spit lead out and shoot your range buddies.
Auto pistol: Had a H&K P-7M8 when they first came out. The striker mechanism would skip over the striker if it was in the least bit dirty. In 1985 it cost me $500 and was sold after 5 or six of these malfunctions. About 4 weeks later. The company just told me to keep it clean and shot super clean ammo. Stopping on almost every range session is BS. particularly for a high end gun.
Rifle semi Auto: I had an AR-15 (car-15 clone) at one time made by a company I can't remember. Around 1982. You basically had to hold the magazine in place due to the slopy parts not being in the right place. What a piece of #$%*.
Rifle Bolt: Bought a M-70 classic in stainless with a boss that was not straight with the barrel. The plastic stock had been bedded with a hot glue gun. the bolt shroud was not complete.... Must have been a Monday gun.