this while this may be true for most of us, this is not true of military and police. personally if I was chosing a side arm for M&P, then I would seriously consider based on these tests. I actually like this test more than the frozen solid tests because this could be something in the field. also, I carry my sidearms in the woods for protection against wolves, cougar, and blackbear. if my gun can't handle a little sand, dirt, water, etc, then it does not belong on my hip. accidents do happen, you do fall down in the field, skid down hillsides, or even stop and sit for a while, all of which are conditions where debris can get packed into your gun. yes, if you just plan on buying a gun to shoot at an indoor range, that's great, you'll never have this issue. if you just plan on keeping it tucked into your waistband all day, great this will never be an issue, but any situation, survival, defense against 4 legged badguys, or (yes the banned topic) sthf, not to mention duty weapons should be subjected to these kinds of tests. I also like that he said that beforehand it was properly cleaned and lubed and demonstrated that it worked beforehand, just as any gun in the field would be before having any foreign matter introduced. the tests where you run a gun that's been stripped with no lube and then freeze it solid then run over it with the truck and then stuff it full of sandblasting material is completely unreal and idiotic, but the test as these guys have set it up. appears to be pretty simple and realistic depending on your locality for your application.