I think this is actually an Me410A (Me410A -1/U4 to be pedantic!). it was armed with a 50mm BK 5 cannon and was designated as a bomber destroyer. This version had no other forward firing armament but did have two rearward firing MG131 machine guns in remotely controlled barbettes on the sides of the rear fuselage. The BK 5 cannon was, apparently, an old armoured car weapon adapted for aircraft use.
I really don't recall. I browse around and some of this stuff comes up. Go to 'cooliris'. It's a great site. A wall of pictures comes up and you move along click on a picture. At the top right you type in whatever comes to mind and google ,yahoo or whichever you want. It is 'cool'! Play with it.