8/14/20 - This is a scarce M1 Carbine that was manufactured in 1943 by Standard Products. They produced only 4% of total M1 carbines for the war, one of the rarest makers. A full parts guide is included in the photos but stock is S-HB marked and barrel is Underwood produced with date of February, 1944. Adjustable sight and bayonet lug likely added after the war. Stock is in terrific condition and bore is minty.