Went to a small gun show here in Arkansas today. Picked up a real nice shooter grade OM 45x7 1/2". Some moron slotted the front site and put a blaze orange insert in it :roll: . But real find was a nice M1 30cal Carbine. National Postal Meter but has a Underwood bbl marked 1-43 with the flaming bomb cartouche. SN is 14803xx. Stock has been refinished. It has an adj aftermarket rear site that I took off. Which style of rear site should go on this carbine? I know absolutely nothing about Carbines, but for $300 it was the perfect time to learn. Thank You krw