TNVC is hosting MTEK, makers of the Flux helmet. This NIJ IIIA features an undercut rear lip. Additionally, that’s an M-LOK compatible rail which also accepts O2 masks. The helmet is boltless, meaning no bolts protrude through the .186″ shell. Yep, that’s the thickness of a carbon fiber shell, but it’s ballistic. It also weighs just 2.2 lbs.
There are a whole slew of innovations surrounding this helmet so check their site out.