The short-stroke gas piston action of the M-1 Carbine, so the legend goes, was invented by federal prisoner David Marshall “Carbine” Williams in the late 1920s, and he was paroled for this service to his country. Williams was hired by Winchester in the late 1930s, and his refined designs were developed into the M-1 Carbine, which was adopted at the beginning of WW2 and produced by Winchester along with 9 other companies. This Box of 6x US Army WW2 Rock-Ola "R-O" Marked M-1 Carbine 15x Round Magazines is in Excellent Condition, with all but one of the mags remaining sealed in their original brown wax paper wrapping, and the one that’s been opened with virtually no wear evident to the crisp blued steel construction. Most interestingly, they all boast fully functional followers and fully intact floor plates, carry the maker’s code “R-O” stamped at the lower back spines, denoting manufacture by the famous Rock-Ola, and come in a 1950s US Army issue M-1 Carbine accessories kit cardboard box. A beautiful example of a rare, original Box of 6x US Army WW2 Rock-Ola "R-O" Marked M-1 Carbine 15x Round Magazines. Lastly, this box of mags comes directly from the personal collection of renowned US military firearms author and historian Bruce Canfield, and a signed letter of authenticity stating as such will be included.