The problems with the J-22 are fact and NOT speculation or hearsay. The person that shot his hand had over 30 years experience as a gunsmith/firearms dealer at the time of the injury. I'm not sure of the exact details of the accident but he has no reason to lie, and a disfigured hand as proof.
22 LONG RIFLE CALIBER SEMIAUTOMATIC PISTOL
WARNING: These pistols may create an EXTREMELY DANGEROUS CONDITION and a POTENTIAL FOR SERIOUS INJURY by firing when dropped.
This model pistol trigger/disconnector bar and sear level may have too small a gap between them such that a sharp movement of the slide rearward could cause the weapon to discharge without the trigger being pulled.
The discharge is created by the moving slide impacting the disconnector and driving the trigger bar/disconnector rearward into the cam lever before it can pivot downward and out of alignment.
AFTE Journal, Winter, 2001; Volume 33, Number 1:48-49