6/23/20 - This is an excellent and uncommon IBM M1 Carbine that was produced in either late 1943 or very early 1944. The last photo in this listing is a detailed parts sheet with the markings on each piece. The parkerized finish is excellent with hardly any wear to mention. Bore is mint and the gun has smooth mechanics. All parts are detailed in the spec sheet, but the bayonet lug would have been added post-factory. The stock is in fantastic condition with no defects and hardly any dings, and has a sharp cartouche. Magazine is 'C-B' marked.