I’d point out that someone has finally started making faceplates for riot headgear that is 5.56 proof, but it looks like it will be a long time before something practical that’s also 7.62 NATO proof and can absorb enough of the shock that the user’s neck doesn’t get snapped.
Before someone trots out the paranoia flag, there have already been shipments of LEO-intended armor lost to theft and hijacking, plus the cartels in Mexico have been rumored to be using such armor - and we know that crap is spilling back across into the US. Some people have already experienced armored non-LEO invasions of their homes here in the US.
Yeah, I’ve heard about the “bullet-proof face shields” - basically 14-18mm thick polycarbonate (with something like 4-5 pounds of weight in the shield alone). It’ll stop a lot of rounds, but shatters like crazy rendering it opaque. You might not kill him, but he’s going to either be blind, or take the shield off - and then it’s a non-issue again.
Not to mention, probably deaf and with a mild concussion from the impact of 1000 lb-ft smacking you in the head - think fastball to the batting helmet kind of impact!