Yes they will fit all the M-1A1 stock systems. These are very nice rifles and shoot wonderful. Two types of gun owners those who want one and those who want one that cost a lot more than the other. 900.00 is a nice price with those stock
As Jim said, yes. These were built with what looks like a mix of GI and Chinese parts; forged receivers, chrome lined barrels, walnut stocks, fiberglass handguards. One has a NM flash hider/front sight, and the other has a standard setup. One bolt is SA, the other is HRT.
There was a just an interesting article on this model of M14 type rifle in Shotgun News; the author was impressed with 'em (as am I). I won't replace my all-GI parts (on a old Springfield receiver) rifle as tuned by the crotchety founder of Springfield Armory (not those "pig farmers from Genose," as he likes to call them), but these are solid guns at a very reasonable price. I put the pictures up for the wife of a (dead) friend; they are her rifles to sell (not mine) so no boxes, no paperwork, no tax.
Bought one of those back in '96. Sold it like a dumb-ass a few years later. Kicked myself for about 10 years for that, then I finally bought an M1A. Great rifles for the money back then. Almost impossible to find now, but still a helluva deal compared to a polytech or norinco AK these days. And that's easily twice the rifle.