No the 4 rails on it are picatinny.
Yes, all scopes that fit on the 7/8 rail will fit on the salvo.
Yes, any scope with 8/11 rail attachments.
Unscrew the barrel, take off the hopper. Then unscrew all of the medium screws and take the shroud out and the left receiver half off. then lift up the stock out of its set rings and relive pressure...
No, It is Semi automatic mechanical. You can buy and electric trigger that allows for full auto.