Any helmet is still better than no helmet, but at least one World War I-era brain bucket designed by France is better than your modern design in protecting against overhead blasts.
The NGSW-AR is the successor to the now-defunct Lightweight Small Arms Technologies machine gun program. Textron’s submission for the NGSW-AR appears to be a reworking of its LSAT prototype, albeit chambered for a new caliber with a few visual differences, including a new stock.
D3O just announced a new partnership with RRDS which will allow end-users in North America to purchase D3O protective defense products directly from RRDS.