10 grenades at the first moment of the largest invasion in history was certainly possible, particularly if the guy new an ordinance officer.

but you can bet he did not have 10 ever again after that day, except when he was coming back from R&R behind the lines. For one thing they are BOMBS. Bombs go boom. Sometimes even when they are in your pocket.

But as for limiting grenades, this is a GAME and in the real war you did not have most of the soldiers running down the street at full gallop throwing grenades left and right because they knew they would be allowed to get up and brush the dust off of them after they got "killed". If you were close enough to the enemy to actually throw a grenade at them you were closer than anyone wanted to be.

Anyway, typical General Issue in the American soldier was two fragmentation grenades and then typically one phosphorus grenade or similar specialized grenade for concussion or what have you. Some even had Gammon bombs, but G.I. was two frags and one special grenade of some type.

Also, the grenades in the game travel a LONG way. I suspect longer than the average Joe/Fritz could toss them in real life.

They might have thrown them a ways but I dont think they would hit and then travel on the ground as far as they do.