M249 Para A U.S Marine with the M249 Paratrooper; identifiable by the collapsible stock. What’s really interesting here is the optic. That is the Israeli MARS (Multi-purpose Aiming Reflex Sight). The U.S military issued the optic to some branches/units for field testing during the Iraq War. I don’t think they adopted it though or maybe they are in the stages of finalizing it something. Normally the MARS is seen on the TAVOR bullpups.