I got inspired by the MSR tent stake hammer and pushed the concept into an axe design. This design is less than 3/4 lb and almost a foot long. The handle is 7075 and the steel is whatever you want it to be, it's a concept The steel head extends a couple inches into the aluminum handle and is press fit then riveted. What do you guys think? All comments welcome. Edit: Just checked my math again, weight is coming in at an impressive .667lbs as configured with titanium pins. I'm happy because the design is actually beefier than it needs to be at this point (I'm pretty sure, engineers feel free to make me look stupid). The thickness of the blade portion near the top is .30" but it could be .25" to save more weight. Edit again: Just deepened a couple of holes and filleted corners to remove stress risers, weight is now .656 lbs.