Springfield Armory's over-under survival rifle chambering .22 LR over a .410 bore shotshell barrel, folding for compact storage. Developed from the original US Air Force M6 aircrew survival weapon, providing both rifle and shotgun capability in a single folding platform. Type: Rifle/Shotgun Combo Action: Break-Action Caliber: .22 LR/.410 Capacity: 2 Year introduced: 1983, USA Weight: 4 oz Overall length: 31.5" Status: Discontinued Intended use: Survival, Collecting