Understood, its just hard for me to imagine making a gun heavier as opposed to lighter.
It matters not on my M7 in .358.
What does matter is low-light performance and then the usual stuff.
So far, after a month, the 1.5x5.8 is "better" in low light than my Loopy 2.5x8's. I could care less about a few ounces or some length. It's not a sheep rifle.