[the gillman@blacklagoon.com]

My father had a Hi-Standard .22 target pistol that eventually turned itself into full auto. If I remember, he said the secondary sear had worn out.

Ten rounds in about one or two seconds. He considered it dangerous and put it somewhere. No idea what happened to it.

[Sender]

True, if the hammer or disconnector or springs wear out, a gun can 'double' or even run a whole clip of shells accidentally. This is a dangerous and very undesirable condition and which often results in blown-out cases and injuries. I don't consider worn-out, malfunctioning guns as any sort of 'conversion'. There's always some bubba who will try this kind of thing on purpose though...he's a Darwin candidate as well as everyone standing nearby at the range :)