Don't want to turn this into yet another CGN bear defense thread, but.....
To use the Mare's Leg as issued for a real bear defense gun is certainly someone's prerogative, but it sure isn't ideal. Putting a full stock on it would make it much more effective. A good revolver would be 10 times better for this purpose than the chopped down stock Mares Leg.
Like I have said before, I'd use one "as is" to do some "handgun" hunting but that is an entirely different set of circumstances than facing down an irate grizzly with a gun that is difficult to aim and reload, although sometimes just the mere presence of a gun (any gun) in your hand is enough to give you the courage to stand your ground and make a bear back down and leave you alone.
I tend to agree with Ardent about the urban guys that want "novelty" guns for bear defense. I think the 8.5" Pistol grip shotguns and Mares legs look cool, and of course they are better than nothing, but far from "ideal."
I think it's important to choose a light/short gun you will carry but will also work well if you need it. The guns I will reach for when I pack a "defense" gun are my .45 Colt Trapper with a 16" barrel (loaded hot) and my 14" barrel pump shotgun with no stupid side saddles or picatinny rails on it, just a great big, tough as nails hand filed rifle sight. I think 14" barrel is about as short as practical in a shotgun (but 12.5 might not suck) And if I could carry a good revolver I'd probably take that instead of any long gun at least 50% of the time.
If I am actually hunting grizzly bears I will take my .375 Ruger and there are some places in BC that seem to hold lots more grizzlies than anything else and I'd carry the heavier and longer 375 in these situations, too.
Bottom line is that while the Mares LEg intrigues me for it's capability to be a "fun" gun and to get as close to handgun hunting as we can in Canada, no way would I bet my life on it as a defensive gun and I personally wouldn't advise it to anyone that asked me, either. (Unless they were to install a full rear stock)
