Very good condition M1 Garand Narrow Base Gas Cylinder made at the Springfield Armory. This is correct for early WWII Springfield Garands made between appox June 1940 and July 1943. The bores on these gauge New! These cylinders were refinished using the original Dulite black oxide process and come with their original stacking swivel. I have very few of these Narrow Base Gas Cylinders with new bores left so get them while you can.