YOO GUYS I think I just made up my own Argy trap randomly from meh brain :O Its cheap, it works well even on mountains.

I used this for trap testing:

1. A Stone Foundation

2. 2 Stone Ceilings

3. 4 Stone Railings

4. 2 Stone Pillars

After building the trap I got attention of an Argentavis and I run trough the entrance of the trap and put 1 railing behind it and BOOM. It worked lol

Note: I can't explain how the trap looks like because we can't share images here.