I purchased this from a USMC Capt. who bought it in 1992, it was still sealed in the bag when I bought it in 2008 (cheap, compared to todays prices) I haven't completely stripped it down but all parts I can see are SA.
Here's the bag.
It is EP on the receiver leg SA over 1-64 indicating a rebuild in Jan. 1964.
Barrel is dated Dec. 63 and gauges with a stone axe gauge as "New" under 1 for both TE & ME
It is glass bedded as you can see by the yellow "Stuff"!
Nice heat treated receiver
Overall picture
Nice DAS stamp
Don't know what this mark is?
The bolt
Circle "P"
The muzzle, you can see the sharp lands and grooves if you look closely
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