two hand grenades would do?
No
.You need to ask yourself how the hell a soldiers/terrorist can come very close to a tank which his Secondary armament:
L\1 × 12.7 mm (0.50 in) MG
2 × 7.62 mm (0.300 in) MG
1 × 60 mm (2.4 in) internal mortar
12 smoke grenades

and what about going underwater??

