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Legacy Member
Some interesting Saginaw Grand Rapids receiver features.
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02-23-2020 06:33 PM
# ADS
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Contributing Member
Interesting stuff, Does 3,639 have an SG stamped anywhere on the left side?
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Legacy Member
Not that I can see but it's got the SG tang with no locator hole.
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Legacy Member
I wonder if the receiver ring getting shortened came at the same time that the locator hole stopped getting rounded off? The font change was prior to that according to the serials exhibited, but maybe that's just because of the examples I have suggest it while it may just appear that way due to the order they were being worked.
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Legacy Member
Here's a little more interest. Note the 3.65 at the top and it's locator hole being rounded, and has the longer ring yet has the squattier letter font of the later receivers.

Last edited by tenOC; 02-24-2020 at 10:46 AM.
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Contributing Member
I don't own one, but always wanted a Saginaw being a GM guy.
Veteran US Navy Seabees - US Army Corps of Engineers - American Legion Post 0867
" Only two defining forces have offered to die for me. 1.) Jesus Christ 2.) The American G.I. "One died for your soul, the other for your freedom! "
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Legacy Member
Can anyone comment on which CCNLs reference the SG receivers used by Grand Rapids.
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Contributing Member
CCNL 357-11 discusses the SG and S'G' mixture. Not sure if that's what you are looking for.
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Legacy Member
Thank you, I saw that one. Supposing about by the manner in which they were assembled was it similar to the regular Prime Carbines? Parts wise, I mean.
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Legacy Member
S'G' Receivers
I would like to see the right side of the 3639 rec. I think it is just a S.G. receiver sent to S'G' to help them finish their contract. I have S'G' 3637--- and that is what it is you can tell by the way the slide groove is milled. S'G' and S.G. were milled different.
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