Ok. If your grandpa was an infantry Marine going into action for any battle after the Guadalcanal campaign there is a very good chance that IF he was a rifleman, then he carried either an M1, BAR or 1903 set up for grenade launching. Any infantry Marine that was a mortorman, MGer or flame thrower etc possibly had the M1 Carbine. If he had a rear area assignment or stateside assignment then he probably had the M1903 in one of its various configurations. In fact I don't think the USMC even got the A3 variant, and probably did not ever get an M1917. The USMC never liked that rifle and never even had it during WW1.
And no, the M1917 never had a windage adjustable rear sight, which was the reason the US Ordnance department didn't adopt it as standard following WW1 since it was the most common by 1918 by a large margin.
And no, the M1917 never had a windage adjustable rear sight, which was the reason the US Ordnance department didn't adopt it as standard following WW1 since it was the most common by 1918 by a large margin.
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