thats a tiny, fraction of a second movement, hellfire. its easily fixable to move it the 3 degrees it would take to make it not appear to move away a bit. plus... its not like his arm flails all around obviously making it look not natural. and witht he muzzle flares and bullets(and trails) flying around, trying to evade people from filling you with lead, you're not gonna have time to see that it moves a millimeter off.
I felt like putting a bullet between the eyes of every panda that wouldn't screw to save it's species.