M1 Garand Springfield Gas Trap Bolt D28287 D-1 '32 thru Nov '39 useEarliest known production bolt used in M1 Garand Gas Trap rifles produced from start of production thru 20,000 ser# range. Springfield production with D28287 Drawing # and Heat Lot D-1. Very Rare item! Bolt is STRIPPED with dark finish and not much use wear. Nice! Click on image for larger view of ACTUAL bolt.