Near the conclusion of the movie, as David Redfern and Rankl struggle for control of the gun, Rankl has it by the barrel, but when the camera angle changes he suddenly is holding it by the grip. In the Amazon Prime streaming version this happens at about 1:30:04.
A flock of seagulls are squawking around a body floating on the water's surface. A moment later another character has to dive to find the body weighted down well below the surface and not in any position to attract the birds.