:cb2: There have been a few stinkers over the years . . .
First was a .40 EAA Witness. Bought it used, and found out very quickly why the original owner sold it. You couldn't shoot a whole magazine without the magazine disconnecting. It wouldn't fully eject, but would disconnect enough for it to not fire. Also, at the close target--7.5 yards--it shot 6 inches high and to the left. That means, of course, at 25 yards you were not anywhere near the paper. Took a beating on the trade in, but I got a 2.5" S&W 19.
Marlin Cowboy II in .44 mag. Another used gun. First it wouldn't feed. Then when that was fixed, it patterned like a shotgun. My dealer took it back on trade. Got a Ruger .357/9mm Convertible.
Taurus .45 Millennium. This time it was new. At leat once per magazine it would not fire when you squeezed the trigger all the way to the rear. Then, when you let off the trigger, BANG. Sent it back to Taurus, and they fixed it, but I never trusted it. Finally found someone who wanted it anyway. Needless to say, he got a great deal!
Ruger Mk. II. Jam-O-Matic. Traded it for a .22 revolver.
The Witness, I was young and stupid. Never again. The Marlin, they have trouble with .44s occasionally. Later got a .357 CB and it's fantastic. Taurus, never again. The Ruger . . . maybe it was just a bum gun.