Italian gun, featuring a hidden bolt. It was advertised as having that feature. No screw to retain it, not visible from outside the gun.

[Linked Image from jpgbox.com]

[Linked Image from jpgbox.com]

The actual catalog parts list from the gun does not show a cover for the hidden fastener being available for sale, much less actually being there. They do list the cover for the hinge pin, 35 cents got you a new one if the need arose.

[Linked Image from jpgbox.com]

I’ve looked with a 10X loupe, can’t see anything that demonstrates there is a hole in the left side to put the pin in.



Best,
Ted