Quote Originally Posted by spyder View Post
They can jam. The ends of the arms wear, or break off as a couple examples.
True, but that is a mechanical failure due to stress and fatigue.

Even a good quality automatic in perfect condition can jam if there is a hard primer or the pistol is fired limp wristed. A novice may not acquire a proper stance under stress, nor may they be able to clear a jam quickly if they are being attacked.

I had one revolver jam due to primers backing out of aluminum cases, and another jam due to a 40 year old mainspring that was dry as a bone. Those are the only two jams I've ever had with a revolver. I've had dozens of jams with pistols, even once with a Glock. Sometimes it can be cleared, other times it can't.