Keeping with the Arado story:
Even if the engineers adapt the Ar.555 to be a gunship, originally was a bomber so their mobility capabilities were not that so great, so alongside whit this they make an interceptor to complement the gunship, and their best option was this plane.
Because of the original concept was adapted to be a rocket fuel interceptor, the fuel was their first priority, but because they needed a fuel efficient airplane they put 2 Junkers 004B turbojet engines (ripped off of an AR 234) and with a few tweaks the aiplane is now capable of make a 25k ft of ceiling with his original speed (920 km/h/572 mph). The guns were the same of the original concept; 2MK 108 and 2 Mg 151 under the nose and 4 rocket pods to deal with big tarjets.
The airplane is very balanced and has a great maneuverability and serve very well as first defense wall.

Ps: In reality the aiplane is capable of more than 35k of ceiling, but at that altitude reach almost 800 mph and because of the almos inexistent info I took the data from this and this pages but i make the airplane with that power beacuse the aiplane can stall very easily whith less power at low altitudes.

AG6=reverse thrust
AG7= Activate Gyro