Hello. I've been playing with tanks recently, and I find there to be a few issues, personally, with the two mentioned weapons.

First of all, the Forge gun can be slightly overpowered at times. Once, I took a militia forge gun, the one that's supposed to be the Civilian sort of equipment, and climbed up high where I could see quite a lot of the map. The reason I had done this was because of a pesky Sagaris. Quite a formidable tank, it could take quite a few hits. However I was up high, and tanks in Dust have trouble with this. Sometimes the crosshair for a tank's weapon don't represent accurately where the shots will land, so that 's a problem for him. Another issue is that when the tank is somewhere below you, he probably wont be able to shoot you at all since his gun can't aim that high, so another layer of difficulty. I just picked off the sorry guy as he was running away from me while I just shot him with my gun. I see a problem here, as that was a high end tank destroyed by militia equipment. We need some sort of nerffing on not just the militia forge gun, but ALL forge guns. 1200 damage, with pinpoint accuracy? That's ridiculous, even with the strange lag of the blast.

TL;DR People can shoot from mountains with a gun that does 1200 damage in a single shot. It's like the missles all over again.

Forge guns are fine. Well equipped tanks can take a pounding. Maybe a 10% reduction in power for the militia variant, but leave the other ones alone. Against a good tank it would take 2 or more forge gunners to destroy it.