M1 Garand Springfield Bolt D28287-2 X1 May-Aug 1940 useEarly M1 Garand Bolt. Springfield production with D28287-2 Drawing # and Heat Lot X-1. This was the first of the generation "2" bolts and heat lot was hand stamped in the center of bolt, follow on heat lot numbers generally went beneath the drawing number thereafter. Seen on May thru August 1940 rifles and later (SN# range 38,035 thru 59,868 on). Bolt is Stripped and has arsenal finish and is blackish/dark finish. Click on image for larger view of bolt.