Quote Originally Posted by Ron3 View Post
Correct.

Wolff gunsprings sells versions for the oldest version, but models with a suffix are different and nobody makes extra power springs for them.

Allegheny Arms told me they wanted to make that happen.

I do not think the 80x slide will fit on an older lower. Different recoil spring assembly entirely and slide lock / release lever. The barrels, as you know, swap across the Cheetah line.
I’d have sworn I checked an 80x slide on a legacy gun. I’ll have to try it again and make sure before I throw money at it.