Thanks for the comments guys.
Yea, WT I think you're right the barrel of the MG is a little thin, but not by much IMO. The base is 50mm and tapers down to 40mm, thin, but not too thin IMO for a weapon that has a bore of between 10 and 15mm. It does have a muzzle break, I'll scale it up too. I don't think the rocket launcher is undersized though, not by half at least. The rocket tube bore is 56mm, the LRM tube bore 100mm. I will scale it up a bit but not double.
Psyckosama this vehicle is huge compared to anything in the real world. This thing is another meter wider than an
LVT-5 and those things were real monsters. But I'd hate to be in one with 33 other marines, that's tight quarters even by sailor standards. The weapons I've mounted on the Pug are going to look puny compared to the vehicle.