The Expendables (2010)

Continuity mistake: After the plane is docked Stallone and Statham enter the customs agency. Statham is wearing a camera on his neck with a small lens, he even shows it to the customs agent. After leaving the customs they walk across a square. The camera now has a big zoom lens attached to it. Statham is not wearing a lens bag. Where did he get that lens from? Also strange is that the lens is set in manual focus instead of automatic. Yet the picture stays focused even zooming in. This is not possible without looking at the screen. Plus the camera is turned off in the close up shot, with the image on the LCD composited in. (00:28:15 - 00:30:45)

Whitehouse

Hale Caesar: What happened to you?
Barney Ross: I got my ass kicked.

Trivia: Wesley Snipes was the first choice for the role of Hale Caesar, but couldn't accept because his tax issues made him unable to leave the United States.

Question: What weapon does Hale Caesar use during the final fight? Is it a modified version of the AA-12 or a custom-made piece for the movie?