Read first - make your choice (do 1 of 4):
  1. Set every sens to (1.0x), so every scope will match the old Holo/Reflex/Reddot sens (good for eye-hand memory)
  2. Set every sens to (2.5x), so every scope will match the old ACOG sens (good for eye-hand memory)
  3. Set every sens to 50, this will match your Shadow Legacy hipfire sens 1:1 on all scopes (it will match the Visuomotor, not 360° distance!)
  4. Or, restore the old behavior (pre-Shadow Legacy) - use all the values of the calculator to match the old feeling (uses official Ubisoft values):

Scope: Sens

1.0x:
1.5x:
2.0x:
2.5x (new ACOG):
3.0x:
4.0x:
5.0x:
12.0x:
Click to see GameSettings.ini (entries are below [INPUT])
AimDownSightsMouse=55 ADSMouseUseSpecific=1 ADSMouseSensitivityGlobal=50 ADSMouseSensitivity1x=38 ADSMouseSensitivity1xHalf=61 ADSMouseSensitivity2x=62 ADSMouseSensitivity2xHalf=62 ADSMouseSensitivity3x=63 ADSMouseSensitivity4x=63 ADSMouseSensitivity5x=63 ADSMouseSensitivity12x=97 ADSMouseMultiplierUnit=0.020000
If you change ADSMouseMultiplierUnit:
AimDownSightsMouse=55 ADSMouseUseSpecific=1 ADSMouseSensitivityGlobal=50 ADSMouseSensitivity1x=38 ADSMouseSensitivity1xHalf=61 ADSMouseSensitivity2x=62 ADSMouseSensitivity2xHalf=62 ADSMouseSensitivity3x=63 ADSMouseSensitivity4x=63 ADSMouseSensitivity5x=63 ADSMouseSensitivity12x=97 ADSMouseMultiplierUnit=0.010000
09/11/2020:
Added "Show decimals" option. You can use it to make the calculation more accurate, requires changing GameSettings.ini though.
I'll use Twitter (@kurtextrem) to communicate further updates.

P.S.: If you have changed your XFactorAiming value in GameSettings.ini, you need to set the exact value to ADSMouseMultiplierUnit now in GameSettings.ini.
P.S.²: If one of your friends can't access this link, try this one instead: kurtextrem.de/sens.html. Some adblockers block "ads.html".
P.S.²: Calculator made with ❤️ by @kurtextrem (me). Thanks for helping initially @LightleRyan.