Couple of tips.
Put mouse pointer tip in center of sight on ostwind. Move head up for MUCH better field of view.
Get elevation where possible, armour is MUCH thinner on top, plus makes you harder to hit.
Try to hit sides, back, top, anything but straight on frontal shots. Use smoke shells creatively, they have many handy uses.
Against light targets like M16 & M3 use HE instead of ap.