During the last half hour of the film, there is a moment when one of the soldiers at the compound is holding a gun in his RIGHT hand and raises his hands when Stallone points his gun at him.

From the front, the soldier is holding the gun.

There is a cut to the soldier's back showing Stallone in front of him and NO GUN IN the soldier's hand - just an empty, open hand with spread fingers!

Then immediately it shows him from the front again and he slowly drops the gun that magically appeared in his hand again...