SOCOM 16 - Shot way too high and had to go back for a taller front sight otherwise no problems, just horrible accuracy.
Standard in walnut - Came with a few major runs in the stock finish and a bent front sight ear, no problems, very accurate, but ruins brass by extreme stretching. After a rebarrel it should be a nice gun.
Loaded now in GI fiberglass stock - No problems, accurate, very happy with this gun.
Supermatch in walnut - Came with extreme slop in op-rod to reciever fit and extreme radial gouging in the chamber. Went back and got a new op-rod which is still pretty sloppy and the chamber was hogged out to remove most of the gouging. This gun was a real dissapointment, as was the SAI "fix". I plan to trade it off as sloppy workmanship just frosts me. Don't think I will buy another SAI anything after this.
The platform is great but I would seriously consider buying something other than an SAI, or I would buy a GI M1 Garand from CMP (SA Service Grade Special is my recomendation). It costs a lot less and is a high grade gun.