Quote Originally Posted by diopter View Post
But were accepted for Swissicon regulation Military shoots since the at least the 1970's Seems the US rules are more hide-bound. Mind you, you can also shoot in the open/match categories. For Swiss Military Shoots: The K type Diopter was accepted for competition Jan 11, 1963 The S type Diopter was accepted for competition Dec 10, 1973

Muchas gracias for the link. All I need now is to win the lottery, so that I can afford a Swiss diopter. No joke - a Swiss diopter costs more than a G11.