The Inland M1A1icon carbine was made at the same time as the M1 carbines were. There is no separate listing of M1A1 carbines. Starting in very late 1942 with serial numbers above 30,000 range it is thought, until the last one was made during December 1944. No new M1A1 carbines were made after about the 6.5 million serial numbers range. No date after 12/44 on a barrel for an M1A1 except as a rebuild or replacement.
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