[Hodar]

Probably the biggest problem would be finding a 50mm cannon and ammunition.

German BK-5 50mm Cannon

"The BK-5 was an adaptation of a tank gun and was intended primarily for use against Allied heavy bombers. Its magazine held 22 rounds and the gun had a rate of fire of 45 rounds per minute. "

I think you can get these at Costco, they sell everything. :-D

[fso301]

I think that was used on a Messerschmitt. Can't remember the exact designation. ME-410?