Hi kryo, thank you,
first: some main problems:
-disappearing is unavoidable, cause when the animation disappears(stops)
the turret does it too, cause its part of the animation

-billboarded turrets, its visible from all sides, so it causes an effect of 3 dimensionality. This is the best looking way cause models causes see-through effects what traces back to the shading of weapon animations, and thats unavoidable yet too...
but all in all, I try to do the best with the animation and beat myself next week, with a full Mod of these weapons =O)
-Stefan