M6 Aircrew Survival Weapon

The M6 Air Crew Survival Weapon was a specially made firearm issued to the United States Air Force aircraft crews to help forage for food in the event of a plane crash.

The weapon was a superposed ("over-under") combination gun, with a rifle barrel located above the shotgun barrel. The rifle barrel fired a .22 Hornet bullet and the shotgun barrel was chambered for a .410 bore shell

Versions
Being a military firearm, a number of manufacturers have made versions of the M6. The originals were made by the Ithaca Gun Company, and sold only to the US military. The standard version, as used by the military, has a 14-inch barrel version, and folds in half to a minimum size of 15 inches. The 14-inch version requires federal registration and is taxed in the United States as an Any Other Weapon by US federal law.

Most notable of the civilian importers is Springfield Armory, Inc., which made three versions. An 18-inch barreled version called the M6 Scout is free from special restrictions. The Springfield Armory M6 Scout and pistol has been made in .22 Hornet/.410 bore calibers and alternately in .22 Long Rifle with .410 bore. The prototype M6 pistol built for Springfield Armory was a version of the M6 which could fire a .45 Colt cartridge in the .410 bore.