I did a search on the forum and could not find anything on this. My son-in-law came across an M1 Garand "National Ord Inc, So El Monte, CA" I did a tear down and it seems in good shape. All parts except the receiver and stock are Springfield Armory. Receiver, of course, is National Ordnance. Muzzle and Throat wear seems low ("1" on my muzzle and throat gauge). I've heard about National Ordnance but could not find anything very informative on the internet. Anyone know much? One source on the internet says the receivers were investment castings-- but I haven't been able to verify that either.
Thanks