Don't know if you guys are aware, but a bug report for you - While using the SUSAT's magnified optic, the orientation of the scope doesn't change when leaning. I've not had a chance yet to test any other scopes with it.
To replicate, simply take a SUSAT scope out on a weapon, use the magnified optic, and lean (Q or E on default controls); the central 'obelisk' the sight remains vertical. For reference, I was using the L85A2 with the AG SA80 (L123) when I noticed this.