Frankly, a selective fire rifle/carbine with even 40 rd. mags is not a very sound choice in a defensive situation. It's "utility"is largely a fantasy derived from the contemporary "ninja" media culture which has subsumed much of North America's gun culture, to our detriment.
Such a gun, if used frequently on "full rock and roll" as the wannabes call it, will soon burn out the throat of it's bbl. and lose accuracy. It is a tool designed for contaminating a large area with projectiles to wound the enemy and thus engage a larger number of troops in caring for their comrades, rendering them less of a threat. It is useful in military applications, but, is not much good for careful, legal home defence.
I might add that one cannot be "safe"from an armed enemy, unless the S.O.B. is either DEAD or severely wounded and ONE precise hit in a vital area is STILL the best means to that end.
A good field shot with a sound hunting rifle, an extended mag. repeating shotgun and a good handgun can defend his home more effectively than some tattooed weirdo with a "black gun" that he owns to project a quality of manhood that he so pathetically lacks....the BC Lower Mainland is full of 5'5"-145 lb. "kewl dudes" of exactly this sort.......
