Any weapon can be defensive or offensive from a rock to a hammer to a car, etc..
Glok 22
Yes.
No it will jam in the barrel.
the numbers refer to the calibre of the weapon, which is the width of the bullet. so a 22 pistol fires a bullet with a width of .22 inches
50 or so
about 250 dollars
french made nice pistol
Mod.T 18 22 l.r. F.I.E
Try e-gunparts.com
Follow the instructions in the owner's manual.
Ruger Single Six
1946