While I am firmly entrenched in the 19th century and no sinophile, I am impressed with what I have learned about SIG's BDX enhanced products.
BDX stands for Bullet Data eXchange and it is an electro-technology incorporated into their products which computes and provides ballistic information and solutions in the sight picture.
AR15.com has a thread about it and discussed it in this day's newsletter.
Here is a link, should you find interest:
https://www.ar15.com/forums/AR-15/SigSa ... 24-733198/