That first sentence is the most repeated disingenuous line promoted by the gun lobby and anti-gov't, anti (anything they perceive as) liberal types and right wing media punditry. I say this because on one hand you have all these civilian/armchair weapons experts swearing that the anti-gun folk put too credit on the AR-15, as there are plenty more weapons better suited for hunting, mass shooting, etc.
But, when it's pointed out that the AR-15 is extremely popular, and the weapon of choice for the majority of mass shooters and anti-gov't protest yahoos (who can be spotted strapped with them at their protests and rallies sometimes), the response is "well, those deaths are statistically minuscule, so I'd take the risk rather than you take my gun".
That's f***ing sick in my book...pure sociopathic thinking. Or if you like, arrested development .... an adult telling a child they can't have that particular toy as it poses a danger to other children, point to a plethora of similar type toys, and the child throws a tantrum, NO, I WANT THAT ONE BECAUSE I WANT IT!
Your second sentence is also disingenuous, as the Dems have put forth various bills that would incorporate mental illness tags in a universal background check system...only to be shot down by the GOP and kept as a state by state mish mosh