As far as I understand the only difference between the SOCOM and the M1-A is in the gas system and a couple of other minor differences. But the stocks are the same. But referring to the stock you posted here! I would go to gunbroker or some other source and buy a complete good stock with all the metal hardware already installed. You can get on of them from $85-$100 with the hardware in good condition. By the time you buy all the hardware for the stock on your thread and maybe have to make some adjustments to the stock. You would be way out ahead to get one from those locations. Only my thoughts! Keeping in mind most are in good condition and have been removed from a functional rifle to put some sort of aftermarket stock on them. So you know you have a good stock and ready to install!
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment