The proportions are wrong,and in some places it somehow feels like Curve cutter or negate was abused.
But it's pretty good in my opinion,considering that the most obvious problems are ignored.
Ohhh ok, I see what you mean. I didn't really use any scale for the width and length of the gun, I tend to just use instincts as to whether the size looks ok or not. I thought it looked alright ;3