10-090 Garand Picture of the Day - more gas traps

[Mark in Rochester]

Army Maneuvers, Ft. Houston, Texas
Date taken: June 1939
Photographer: Thomas Mcavoy

Picture date 1939 - they are all Gas Traps

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[ARCHER 9505]

Do any of you Garand History buffs have any thoughts on why John C. opted for the "Gas Trap" system rather than the already proven port and piston?

[Mark in Rochester]

Think that S.A. did not like the idea of a hole drilled in the barrel.