The March is ideal if weight is of absolute concern. But honestly the glass isn't the greatest, at least mine is not. The eyebox/parallax is sensitive but with proper setup and attention, no issue. I think the nx8 4-32x50 wing 4oz heavier and close to half the price is a better bargain, I have two of those. I still am a huge fan of the k624i. My last one was purchase new for 2100$ and it's lighter with a slightly better eyebox than the k525i.ZCO 4-20x50 is 34.5oz. I have two of these.
Kahles K5-25x56 is 34.2oz.
10oz more than the March F1 3-24x52. But better glass, and better reticles.
Tangent Theta TT315M is 27.7oz, but you lose a lot on the top end. But glass quality more than makes up for it.
March F 3-24x52 is 24.4oz. I think it is just about the lightest FFP high mag scope out. Price tag is a bit north of $3K though.
I had a March 3-24x52 for a while, but eventually sold it and purchased another TT315M. Plenty of magnification for a hunting scope on deer sized game out to any reasonable hunting distance. I run one on my .280AI.