New, old stock in grease Bullet Guide for the Late M1 Garand Gas Trap and Early Gas Port Rifles. This bullet guide is correct for M1 Springfield Armory Rifles made from April 1940 thru Sept 1940. Correct for Rifles with serial numbers 36k thru 65K. The drawing number B8875SA clearly stamped on it. Nice bullet guide to help you restore your Late Gas Trap to early Gas Port Garand.