There are other threads on this subject here at TFF.
One link: http://www.thefirearmsforum.com/show...=jennings+j-22
I cannot copy the others without losing this reply.
The bottom line is that these pistols were scaled up (by Bruce Jennings) to handle .22 LR length cartridges. They are mechanically more sophisticated copies of the Armi Galesi from Italy. The Galesi traces its ancestry back to the German Walther single action pocket pistols, as do several other Italian and French pocket pistols.
Unfortunately, the quality of materials, quality control, and typical workmanship on these Jennings family pistols is often way below their Italian parents, and often not good enough to cycle anything like what could be called reliably even new out of the box, or after a reasonable break in period.
While they are not as bad as their detractors often claim, I do not advise their purchase or sale.
Since the Brandon Maxfield lawsuit verdict of 2003 (that was, in part, about $5,000,000.00 against the gunshop that only sold the Jennings Group made pistol that was involved) I will not transfer ownership of any Jennings Group product nor will I do any work on one. Competent product liability lawyers charge about $500.00 per hour and do not take a case for less than $5,000.00 up front. I have better things to do with my money than pay lawyers.