Serial number: Inland 6,287,036 Barrel Date 8-44 Represented as and appears to be an original gun. Thanks Neill Cowles. It is an Inland Division M1 with a serial number of 5,045,XXX. This Inland built M1 Carbine is on display at Fort Macon State Park in North Carolina. Author's Photo added 1-14-2017. The Inland stamp is easier to read than on the previous carbine and is serial number 210736. Author's Photo added 1-14-2017. Inland Division of GM built 811 out of the 1,919 T3 infrared carbines during WWII. A history of the M1 Carbine. History of the M1 Carbine. SERIAL NUMBERS - The War Department would issue a. INLAND-Any Carbine Inland paratrooper models issued. Inland Manufacturing M1 1945 Carbine. The M1 1945 carbines feature many of the same characteristics of the original Inland Carbines. Inland Manufacturing. The Inland barrel date is 11-43. The Carbine's serial number is 949261X. The X after the serial number denotes that the serial number was accidentally duplicated. The duplicated serial number was given a X at the end to denote the second serial number duplicated.