looks like you've addressed the issue you had with the concept rifle handle having an extreme angle. very ergonomic and looks like it'd fit comfortably in a persons hand. the adjustable stock is a nice touch too.
I think its going to be tough for anyone to find any negative critiques on this work, the futuristic rifle design looks functional, detailed and (putting aside the destructive nature) quite beautiful. The presentation of the piece is very professionally done too.