The Browning M2 .50 Caliber Machine Gun, Heavy barrel is an automatic, recoil operated, air-cooled machine gun with adjustable headspace and is crew transportable with limited amounts of ...

50 caliber machine guns were also positioned in the “chin ... on display at the National Museum of the United States Air Force.

“Right now, any person, a fugitive or a felon, can carry one of these air rifles, .50-caliber air rifles, through the park, and there’s nothing we can do about it — it’s not a crime right now.