The Weaver, according to an old ad from Optics Planet, comes in at 17oz.
EARLM, don't know how close you are on weight, but if you want a variable, March 10-60 X 52's sit on both of my 10.5lb rifles and make weight. Model D60V52LM on my last one MFG listed weight is 25.04oz. 2-1/2oz less than...