Ihave a question for you- does the MS2 fit around a QD sling mount ok? I mean the part that attaches to the sling swivel, does it stay on the Qd sling mount. Or is the QD mount too thick?
MIAD is G&P? lolwut?
And about the MBUS- You can buy a real one at a number of online retailers since you're US based. If you want PTS- Airsoft Global sells them individually.
The King Arms lowers have white trades. http://www.kingarms.com/productpage.asp?prodid=1665
The rails were also another point.
Fine, the middle one could be airsoft, since every GBBR can use anti-rotation links, but the bottom one, I'm almost sure is RS.