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Battle Rifle: The M1 Garand
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Characteristics of WWII Springfield Armory Hammers


Early Hammer with the extra hole and drawing number on the side.



Late Type Hammers with the drawing number on the face.  This type was used on most WWII production.  The drawing numbers can get you close to determining which hammer your rifle most likely had.  Springfield  was very bad about putting newer production on top and using it first.  I have encountered 3SA hammers being used on new production, HRA, IHC and SA in the early 1950's.


Springfield Armory WWII Production