Quote Originally Posted by Geezer View Post
Just a thought.

If you are going to use the same sights across the 7” barrel Scorpion pistol, the 18” barrel Meteor youth springer, the 18” barrel Mercury, the 19” barrel Airsporter, and offer the option on the cadet Mercury and the Buccaneer of using the same rear sight with an aperture close to the eye, then different height front blades would be a good way of ensuring that all of those sights on all of those guns could be set up properly to hit point of aim at a typical 10-25m distance without having to crank the rear elevation all the way up or down for some of them.
That is the probable reason but nobody has mentioned the different ballistics between the calibres?