Here's the one I use.

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The handle is plastic and very light weight, but yet gives you something to grab onto that is comfortable. I use only the one blade, the wider, beefier one, and put that in a leather scabbard I have from another saw. I use the little 1/4-20 bolt that comes with it and add a wing nut to make tightening the bolt easy. The bolt and wingnut stay with the handle and ride in the bottom of my pack. The blade, inside the scabbard, can go anywhere, riding vertically. I've cut many a skull, ribcage, and pelvis with this saw. Best I've found to date for large game and skull caps. I would imagine total weight is only 6 oz or so.