Your # 4 wears the sight I've always seen on originals.

The one on the OP's is actually a lot more user friendly, in terms of being able to tune and tweak.

AVOID Stingers, Velocitors, etc,....e.g. Super Velocity ammunition, in those old things,....stick with standard or subsonics , and enjoy having both eyes.

GTC

Member, Clan of the Border Rats
-- “Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.”- Mark Twain