[Jan]

as far as i know, top turret armor are usually not more than 15-25cm thick.

About Strv-122, it have more protection on some part of the turret (crew hatch and around crew position, no protection over rear turret). I've no figures for teh Merkava.

I think that such top turret add a bit crew survivability versus aerial bomblet, mortar, etc. but not verus top attack atk missiles.

Some tests have demonstrated that last ATK missiles like russian Kornet are actually overkilling existing tanks since RPG29 are sufficent to pierce actual tanks in their most protected part. RPG are also lighter and more widespread.

cheers,

Jan