Not able to use custom sights

Recently discovered the whole custom stuff scene.
I’ve been trying to use a custom sight of T-72 sights.
Downloaded the file put it into “UserSights” loaded the game up and nothing. loaded the game up 3 more times still nothing. After I heard about a “fix” for it where you make a folder yourself labeling it “UserSight” in the old location of the game but that didnt work either.

Help would be much appreciated!!

The way for custom sight has changed at the last update.