At the time of the M1 ... Star code “NM” marked barrel It should be noted that this star annual code (stamped in the chamber area) was unrelated to earlier M1 NM barrels that had a star ...

30, M1,” popularly known as the ... Rather than trapping the gas after it left the muzzle, Garand’s new design had a port drilled into the bottom of the barrel through which the gas was ...