I got my son one of these for Christmas. Basically, a 702 Plinkster with an AR body. We took it to the range yesterday and it was a blast. He also got a scope from my dad but we don't have the flat top receiver. It has the elevated carrier handle deal so the scope would have to be pretty high off of the barrel.
Yes,don't remove the recoil spring if you ever go to clean it unless you have spare ones on hand.You need to contact Mossberg with the serial number to order a replacement.Been awhile since I checked but at that time they were back ordered 6 months plus.Been a couple years though.I put it in a box and forgot about it.Might give them a call soon.