The JP ULTRA low mass ALUMINUM BCG.

I'm not at all trying to be a smart ass as I have tons of respect for JP.

I am just curious. I realize the whole adj. gas block/dialing everything in etc. in search of minimal felt recoil.
However, I was surprised to lear a while back that aluminum on aluminum friction can be disastrous at best.
I figure there is some coating on this BCG. But so darn light.

Another reason I am thrown off is that BAD and BENTWOOD designed the OIP sub 4 lb. which I believe is middy gas yet still went with the full auto M16
BCG. Yes in titanium however they worked really hard to get that gun to sub 4 lb. and the BCG, although titanium, is a couple ounces at most lighter than a standard mil-spec weight BCG.

Anyway, if anyone feels like shedding light on that, cool. Thank You