Mark Rubin, in an interview with Outside Xbox has discussed how the new lean feature will work in Ghosts.
After they looked back at their previous titles, they realized that the main thing Call of Duty was missing was first person animations.

So how does lean feature work? There is no “lean button” on the controller (or keyboard) that you have to press for Ghosts. When you go up to a wall/crate, and you’re looking at the edge of a wall – aiming your weapon will automatically lean you out.

Rubin also discussed the new mantle feature which allows players to have a “smooth” jump over blockades – and even in some cases – you can continue to shoot your weapon.

You can watch his full interview with Outside Xbox here:

SOURCE: Outside Xbox