Originally Posted by megastink
what are some good 30mm options for lightweight yet sturdy/reliable rings for my SWFA 3-9x42? Also, what height, if you know the optic. Thanks!
To "know the optic" isn't nearly as important as knowing the dimensions of the gun it's being mounted on and the dimensions of the face of the person who's going to be shooting it.
The rings should be the height which will hold the scope centered on the eye of the shooter when the rile is held with a comfortable and stable hold in the shooting style that's going to be used. (standing, prone, bench etc). No one can do that for you, at least not without you being present for fitting.