Corrected entry: When Helen Mirren fires the Browning .50 cal machine gun in the garage, it shows no recoil at all. Later the machine gun is rigged to fire by itself to fool the attackers. Again, there is no recoil whatsoever, the machine gun stands still on its tripod without jumping away or at least rattle and shake as it would be expected to. It is also doubtful that the Browning .50 cal could fire sustained for such a long time without glowing and causing a stoppage.
Airborne60
2nd Dec 2010
Correction: The gun is bolted to the floor to prevent this. Her partner is seen with an impact driver setting it up.