NIB means new in box, so no without all the stuff and ammo and duracoat. However, not everyone is going to want all that "stuff". Personally, the grip is one I would never use, more so for a pump shotgun. Also a red dot on a non stocked firearm is also not my bag of candy, but thats just me. What do you have invested into it? Try like Awpuck said and ask for 10% then drop it as the time goes on until you get a buyer AND are happy with their amount. With my preference of firearms, I wouldnt pay even $200 for it.
However that is a nice little back scratcher you have on the end of the barrel.