- Its not a Mossberg, most obvious differences are the shape of the bracket that attaches the barrel and mag tube together, and the trigger guard that is more like an 870 shape. I do not think the stock is actually home made either (despite the rather crude appearance), but rather the gun is a Baikal IL-81 "Fox Terrier":commando552 (talk) 17:13, 15 January 2015 (EST)
Also, I think that Lewis Gun is just a dressed up version of a DP28 seen in a lot of Soviet and Russian movies, like The State Border series. Compare the magazine of this fake Lewis from the State Border series to the one seen in this movie, as they're very similar.
PaperCake 17:21 15 January 2015 (EST)