dunno, they look pretty nice, and the mags say they're good, but that depends how much you trust the mags. They certainly look pretty nice on paper. Only thing I dislike (on paper) is the darn nut width (42mm). There's a conspiracy out against me, I swear.
:lol:
EDIT: just in case it's not clear by this, I haven't tried them, so they could be awful for all I know.