Me 262 A-1a/U4 
Bomber destroyer version, two prototypes with an adapted 50 mm (2 in) MK 214 (or BK-5 cannon) anti-tank gun in nose.  

Me 262 A-1a/U5 
Heavy jet fighter with six 30 mm (1.18 in) MK 108s in the nose  

These would be something. The U4 would have a range advantage over bombers would it not?
Infidelz