are you guys asking for suggestions on external upgrades and styling as well as names? if so, here's what I say for the 7.62 rifle.
either keep the full stock, or go with a crane, but a full stock actually looks sweet as long as the barrel is long enough to balance things out.
as for rail system, go with a 12 inch daniel defense mk18 ris II or the 12 inch noveske or a urx rail.
barrel length, anywhere from 16 inches to 20.
some sort of flip up sights for sure, troy style or something similar would be cool.
cool flashider, whatever it is, just not a normal m4 type.
maybe a railed gas block too.
all of this would make for a really sweet 7.62 rifle. I hope that whatever you guys decide on will have real trades.