30M1 stock markings

As the stock on my carbine is now warped to the point of uselessness, I bought another. This is from Saginaw, marked RSG in the sling well.
Attachment 45733

The right sight bears GSA in a rectangular cartouche. Or is it CSA?
Attachment 45732

I only have the Riesch book, which does not include this marking. Can anyone identify it?

The butt is clearly marked with AB-SEC.
Attachment 45731

Can anyone interpret AB-SEC? Or the unclear white stencil at top left?

Finally, top and bottom of the neck there are hand-painted markings
Attachment 45729 Attachment 45730

Any help in identifying these markings would be much appreciated. My normal attitude to painted-on markings is: remove them. In this case, however, I am being a little more cautious - maybe they really do tell us something of its history?

So before I get out the paint stripper - any opinions?

Hi, You are correct that the RSG is Saginaw. The next mark is C-SAA in a rectangle ( it is not showing, but there are two A's) which is a rebuild marking for San Antonio Arsenal. The painted I believe to be rack numbers, company or group. Your call , but part of it's history which may never be known. John

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Originally Posted by JOHN42768

The next mark is C-SAA in a rectangle ( it is not showing, but there are two A's) which is a rebuild marking for San Antonio Arsenal.

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Thanks, that's a great step forward.

Stock markings are stamped into the wood. Painted marks like the ones you have are generally on it when it comes in from some other country. If it were mine I would remove them.

To me, it's interesting that the recoil plate area has been milled off - haven't seen that before. - Bob

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Originally Posted by USGI

recoil plate area has been milled off

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Likely explanation: the wood was damaged in this area, and so it was milled off to make a clean cut to glue on a repair piece (which would then require hand shaping) and whoever it was never got around to completing the job.

Since it was the only stock out of half a dozen or so on offer that was not the later "fat boy"-style M2 stock, I bought it cheaply as being more appropriate to an otherwise correct 1943 barrelled system. I can manage such a repair myself, and for such things have more time than money, plus being impatient to get my carbine fixed.

Are there any other letters or numbers in the sling well? If not it very well could be a Saginaw Grand Rapids stock. I would remove the paint and use a chemical stripper to remove it and help clean the stock. It can be surprising what you can find under it and it also can help raise any leftover acceptance stamps.