I don't know, but it's obviously a U.S. stock, I think a Type III. Have you heard of 'steaming' a stock? Yours could use some steaming, a stripping, stain and linseed oilicon. This is one of those carbines I would be sorely tempted to refinish/restore (but not 'correct' with different parts). There's just one reason I would not do it - the M1A1icon connection and the fact that the barrel and receiver have been together from day one. A correct trigger housing wouldn't be hard to find - uh oh, here I go 'correcting' it after just saying 'don't'. Its hard to resist.