Originally Posted by Watchman
I doubt RPGs have enough "bite" to puncture the shell of a first-rate MBT. Except maybe with a roof hit (buildings, anyone?), or square hit to the rear. Ought to still be able to disable a tread or two though - although at least some Israeli tanks have the option of extra armour to shield those too...
Anyway, one little issue with urban settings is that there's no shortage of stuff the enemy can hide AT mines, big bombs and similar booby-trap nastiness in, which if not quite capable of knocking out a tank may well immobilize it.