U.S. M1 Carbine, .30 cal. semi-auto military. Serial #2120028, mfg. 1943 by Standard Products. Very good condition. Standard U.S. officer's issue during WWII. This specimen's receiver was made by the scarce Standard Products Corp. Parts count: Underwood barrel dated "11-43", triggerguard is marked "B-EF", round bolt is marked "O", op rod is "O.U.". Excellent shiny bore. 15-rd. magazine is marked "SW". Birch stock is very good - no markings. A desirable and collectible officer's weapon from the Big One. C&R OK. Gunrunner West item.