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Discussion Starter · #1 ·
Does anyone know a collector's book, reliable publication or other source that traces the production changes of the SP1 year to year? I'm most interested in the late 60's to early 70's, like the butt stock change from Type D to Type E, the flash hiders from three prong to bird cage, barrel markings from MP S12 to C MP B to C MP C, etc. The Black Rifle and retroblackrifle.com are great, but there is not much detail about civilian rifles.
 

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Discussion Starter · #4 ·
Yes, Black Rifle II has more, but it seems no one has a book showing the year to year transitions. Maybe I have a retirement project.
 
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