I think it only had 18 MG34's (7.92mm) I believe.
Look on the bright side.. it got 20mm cannons.. oh boy oh boy oh boy!
But that HUGE thing would be an interesting addition. To make it worth the up, it would need to have a good supply value to it though. 2 field crates for sure. Can't do much to 10 troops...Or could you? Maybe it carries 20 troops and the enemy really needs to knock it down! Which shouldn't be too hard, right?