> .22, and even 9 mil would just bounce off the metal. flying machines need to be flimsy as paper. if they weren't they wouldn't fly in the air. 22 long rifle would go right through the fuselage. in vietnam helo pilots would take off their flak jackets and sit on them. kek. > >   depends on where you measure. cutouts around doors are thicker, aluminum is sometimes up to 0.250 inches, many places are as thin as 0.040 inches.
Canada