matching set of original c. 1940's antique american industrial m20 recoilless rifle perforated heavy gauge steel

two matching late 1940's antique american industrial heavy gauge steel m20 perforated artillery shell casings. fabricator or munitions plant unknown. the artillery-type spent shells were fired using a u.s. recoilless 75 mm caliber m20 rifle or gun. the pi

US M20 75mm Recoilless rifle

1940's vintage american industrial m20 recoiless rifle heavy gauge

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