Thank you very much for the offer, but I'm afraid I have to decline. After all, 3D modelling is a skill I want to learn myself. However, I would be more than glad to hear what you have in mind when it comes to giving them more detail.
That is great and if you have any kind question about 3D feel free to ask. By more details I mean for example that gun must look like real gun and not just black box.
Well, I've got good news for you. I've just made a (obviously low-quality, but still better than a block as you said) model of a pistol for my game, which I will include in my next update.