Well, my first mounting attempt failed. I was too cheap to pony up for the Axiom brackets. I got some brackets from Monoprice that were supposedly heavy duty and rated for 33 lbs each. I wanted to do it right. I carefully drilled holes in the back of the M22s, installed two 1/4" threaded inserts and bolted the bracket on. When I picket it up to test it before drilling holes in my wall, the bracket wilted under the weight. The metal was just too thin/soft.

Maybe it is for the best since they looked like crap anyway, but now I've got holes in the back of my speakers.