refined as in their finish yes. and S&J threw in some extras like the enlarged safety, mag tube spring, follower, charging handle, barrel clamp, ect, but the guns are all from the same factory, so in terms of quality they are all the same unless one dealer can confirm they requested special materials or work to be done to their model. so any issues that affect one brand could potentially affect them all. that guy with the cracked bolt is of concern, his wasn't from s&j but again since they are all made in the same factory that could potentially happen to the s&j guns. im hoping his was just a lemon though
ive asked Simon to inquire about the bolt material, if its cast, mim, or forged, he said hed look into it but who knows when he will get a reply
all the other issues have been fairly minor, the o rings you had, the handguard retaining plate swinging out on the other fellas, canted sights on some of them. but a cracked bolt is a lot more serious