I am an avid AR builder and since I can never seem to find a Sabre in stock when I have the funds, I decided to just build one. My first problem is matching the moss green color for the receiver set. Does anyone have the exact cerakote part number for that color?
PSA normally doesn’t give out the cerakote #s. As its a clone of the HK, I would search for that instead. The anodized rail is FDE but anodizing is never consistent with any color. The B5 parts are Ral8000.
Welcome 
Cerakote.com moss E-210. They will send you a free color swatch upon request. If you have a applicator near you (there is a locator search on their site) take your part to them and see if you can find a match. Good luck and keep us posted of your results.
Can a guy special order an part (moss green receiver) that is ALWAYS out of stock? Maybe if a feller were to pay in advance knowing said part will be on backorder?
No. PSA does not do pre-orders except with special stripped receivers.
But that’s exactly what I want, a special stripped receiver