I think it's cool. I agree that the gap between the handle and bottom needs to be bigger; nothing a little messing around can't fix. But, seriously, about the size; I think it's good. you're right. Check the proportions. All of you should know if you own the games and strategy guide. The plasma pistol is slightly larger than the Magnum. Have you ever seen a magnum? The pistol is good. Besides, how many of us have actually tried to make a plasma pistol?
You know, I probably ought to give this a 5, but somehow I don't think you got the shape right. The bottom part should curve up a lot more overall and the back should curve down more. The whole thing is more circular; yours is actually shaped a bit like the RIFLE. Still, you did a good job on the colors and details. Keep it up, Artyr!