Straight handled bolt - Remington or Rock Island?

[butlersrangers]

When I purchased this loose 1903 Springfield Bolt, it came with a WW2 Remington shroud, safety, and striker-assembly attached.

Is it a Remington bolt or (as I now suspect) a 'refurbished' Rock Island bolt?

360973609836099

[PhillipM]

I think there is a lightly struck number to the right of the R , making it a Rock Island.

http://www.vishooter.net/slc16_2008.html

[chuckindenver]

RIA, that someone drill the gas hole larger on and parkerized

[butlersrangers]

Thank you gentlemen for your replies. Is it likely this bolt would be a double heat-treat?

[John Beard]

The bolt appears to be a WWI Rock Island bolt that exhibits a WWII USMC gas escape hole enlargement. Only the Rock Island R 5 bolts were double heat treated and the spurious marking beside the "R" does not appear to be a "5".

J.B.

[butlersrangers]

Thank you Chuck and John for your insights.