I need somedont one to model this gun for me in blender with PRETTY desent quality, I need it for my game and I dont figure out blender too easy and I dont have much time as I’m also working in unity with the game itself, please leave a comment if you can make this one for me, would help me out a lot! 
You could just download a model that is already made http://www.blendswap.com/blends/search?keywords=gun&is_fan_art=1&blend_license=&render_engine=&sort=downloads&direction=desc
In which quality do you want it to be? (low-/high-poly)