Ja--we have been making strides in using lighter alloys lately without decreasing compressive strength much, so they're not always very heavy, but the shape of them remains a problem. I've seen some nice holsters for axes, but they're still awkward to carry and nearly impossible to conceal.

Of course if you get on the subject of weapons that are concealable and pretty versatile, I do have a preference for firearms. They're not the most, how do I say...artistic weapons ever, but they're very effective in many contexts.