I'm confused.

[Yournamehere]

I keep seeing this shotgun in screencaps (The Condemned, Pineapple Express) which looks like a Winchester Model 1912, as it has the receiver crimps around the barrel and tube, but it has a rounded trigger guard. Is this some variant of the 1912 or a different model shotgun altogether? Please help.

Edit: To make it more confusing, it appears to have a Mossberg 500 bolt/chamber. What the hell?

Pictures:

http://www.imfdb.org/images/2/28/PINEAPPLE_EXP-62.jpg

http://www.imfdb.org/images/e/e0/Con...erg590CC-2.jpg