The rifle on the bottom left of the third picture has the forward assist; that makes it an M-16A2 at least. Full-auto or 3-round burst, select fire. Not something that you or I can buy here in the US in most states, and not easily in even the few that allow full-auto weapons.
A poster on the source site says this stuff is coming to his country from ours, purchased with drug money. He's wrong on the first point, but right on the second.