F*ck Wal*Mart, I don't shop there anyway!!!!
Also, fully automatic firearms are not legal in the United States unless you possess the proper tax stamps, and MONEY to obtain them. It also requires an extensive, thorough background check and interview. Only people with excessive amounts of money even own fully automatic weapons. Case in point, the HK MP5 9mm sub-machine gun. Full auto runs minimum $15,000, and that's on top of the $500+ BATF tax stamp. You can't even sell conversion kits for full autos, or similar. Open bolts sold must be from 1986 or before, and again are carefully licensed by BATF.
You guys in Cananda, (and many in America), are completely ignorant of our laws and biased due to the ignorant and lazy reporting of the US news media. 99.95% of what people call "assault rifles" and "machine guns", are in fact semi-auto and NOT machine guns. (machine guns are bolt-open) I laugh at the people that don't even understand the classifications for firearms, much less what they are used for.
As has been stated, firearms are NOT the problem. Mental Health of people is the problem. Before OKC bombing, anyone could buy barrels of Ammonium Nitrate. Not so afterward....now it's carefully watched and cataloged, and you'd better be a farmer using the proper amount for your size field!!!!!