Pretty sure the launcher is an older FIM-43 Redeye standing in for a Stinger - the slanted pistol grip and lack of the IFF antenna box are dead giveaways. Also spotted an older Colt Carbine (probably a M653) in that last M16 screencap. Finally, in the first standard M16A1 cap there's also an AK that also has a grenade launcher attached, though it's too obscured to make a positive ID, as well as a SAW/Minimi machine gun. StanTheMan (talk) 11:39, 18 July 2018 (EDT)
Naw, it looks like it's a prop referenced from multiple sources, the gripstock is too big and blocky to come from a Redeye and the tube looks like they based it on a M134 Stinger gunnery trainer since it has that performance indicator box at the back. Plus the grip and trigger don't look anything like the ones from a Redeye. It does have the IFF antenna, you can see it here:
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