I'm digging this. If I might make a suggestion?

The M203s weren't fielded until 1969, so it would help if one of our troops was carrying an M79 in addition to their M16. It will give us more firepower, since they won't have M203s.

EDIT : I'd suggest either [@HeySeuss] or [@Tearstone] as the grenadier. The gunner, radio cat, and medic are all going to be carrying a shit load of extra weight already, and the Platoon Sergeant and Platoon Leader wouldn't be the ones to carry that sort of weapon, since they'd be doing command/control.