Ooo, I should have already looked here to see your 6 mm bomber construct! Serves me right for visiting Taccoms more than Specialist Arms
I see the prototype 6 mm does have a chin gun. I like the general shape still, though I wonder if the defensive weapons could be a bit more interesting (the chin gun seems a bit flimsy). Perhaps there could be two small turrets or pop-up guns on the wings?
For the Q-ship (though it's been a while since you put the render out!) I wonder about the squareness of the torpedo prow torpedo mount. It would be nice if there was some way to integrate it more with the hull, make it seem less like a platform. Anyways, just some thoughts!