Parades often bring polished boots, crisp uniforms, and national pride, but sometimes they also come with unexpected firepower. In today’s POTD, members of the Força Aérea Portuguesa (Portuguese Air Force) march in formation carrying MAC-10 submachine guns, a surprising Cold War-era addition to a modern military parade. The strap in the front is a nice addition – is it the world’s shortest sling ever?

What makes this even more interesting? These aren’t original Military Armament Corporation guns. They’re MAC-10s manufactured by RPB Industries, one of the companies that briefly took over production in the 1970s after the original MAC dissolved. Chambered in .45 ACP or 9mm, the MAC-10 gained notoriety for its high rate of fire (up to 1,100 rounds per minute) and its compact, boxy design.