M1A built from all USGI parts, although over time I replaced a lot of them with aftermarket upgrades; however, I still have almost all of the original USGI parts in a bag, in case you want to switch them back. Has a Winchester barrel (marked 7790190-MAR-62-20R), receiver SN that indicates (from my research, at least) a production date of 10/2003, op rod is marked "7267064 HRA", etc. The only USGI parts I don't think I still have are the stock (and what you'd expect would come with that), the rear sight assembly, and the flash suppressor. 

Aftermarket parts include an M4-72 compensator, extended mag release, extended bolt catch, Sadlak National Match spring guidean M14/M1A CASM scope mount, an Archangel stock that I've done all sorts of goofy crap to, and a weird bipod and folding foregrip.

Also comes with 2 steel mags, one 20-rounder and one 25-rounder, both with bikinis.

$2400 for everything; the price is really only for the USGI parts, including those that have been removed, should you want to reinstall them or sell them or whatever. I don't have a use for the aftermarket parts, and I don't feel like removing them and selling them separately, so you get those as well and get to take your pick. Sweet!