I'm not calling you out, just making a point.
Interesting... one man's negligent discharge is another's accidental. In my line of work, there are no accidental but only negligent discharges. Does this mean that's the end of the road? No. It means you get disciplined appropriately as well as retrained so that you can carry on more responsibly. Is this an unlimited proposition? No. If it happens again, then things get more severe.
TAB -
The way I see it, the AD/ND that doesn't hit anyone is very much like the pedestrian you almost hit with your car. In both it was close, everyone involved had the bejesus scared out of them, and injuries, like temporary hearing loss or twisted ankles or scrapes, may have occurred but will be recovered. After it's over, we get our spanking, take our lessons, apply them, and carry on more responsibly.
Following your logic, a huge percentage of us would never drive again because we almost had an ugly situation occur.
Also -
Per what you wrote only, it could be argued that you had a Negligent Discharge and it wasn't the accident you claim.
-What was your schedule for stripping the .22 down all the way and inspecting the pieces and parts for signs of stress and wear?
-Were you certified by a recognized school to even perform that level of inspection and maintenance?
-If you're not school-certified as an armorer/gunsmith, did you take said weapon in to a certified gunsmith for regular inspections and replacements of parts and pieces?
-Where is your log recording the numbers and types of rounds fired?
-Did you follow all the specific instructions for use from the manufacturer?
-What were their recommendations for proper maintenance and replacement?
-Did you maintain a rapport with the customer service dept for service bulletins and/or recalls?
The firing pin breakage that allegedly caused the inadvertent firing was obviously your fault due to your negligence in properly maintaining your weapon.
Looks like you had a Negligent Discharge and just happened to have your weapon pointing in a direction to not harm others.
No more firearms for you.
Ever.
.
.
.
It's not that black and white, though.