Though I'm by no means the world creator, I did say that the rifle had a bulky laser-sight module on it.
Helmet's are okay, in terms of protection. But a blow to the head's still a blow to the head.
For example, there was some indie company that made a helmet that's bulletproof up to 7.62x39 (or whatever the AK round is). The problem is, even if the bullet doesn't kill you, it's going to knock you out cold.
But, this is a future setting. Maybe the helmet's got some sort of kinetic dispersion layer, like a hyper-dense gel. Or, they're some sort of kinetic reactive plating, like tiny versions of M1 Abrams reactive plating. Though, that's just like firing an explosive from your noggin.