Hmmmm...so that's (kind of) one out of 307 mass shootings this year?
Mass shootings in the U.S.: 307 mass shootings have occurred in 2017
So that excuses all the people killed because the NRA fights against every attempt to bring some kind of regulation on guns in America?

tulc(wonders if this would constitute an actual grasping at straws argument?)
Not at all. NRA doesn't kill people. How many NRA members are mass killers? From the research I've done, the answer would be ZERO. Most mass shootings are black-on-black crime, but you don't see that reported in the news because it's not ratings or it might offend people. A lot of those guns were stolen.
-Vegas shooter passed a background check with every gun he purchased. He would've never been flagged.
-Sandy Hook shooter couldn't have bought weapons, but instead, killed his mom to illegally obtain them. Gun laws wouldn't have stopped him.
-San Bernardino shooters had a friend buy the weapons for them. Gun laws wouldn't have stopped them.
-Columbine shooters were too young to purchase weapons, were able to do so anyway. No gun laws would've stopped them.
-Virginia Tech shooter cleared all background checks and legally obtained his firearm. He had a clean record, so no laws would've stopped him.
-Fort Hood shooter was a member of the military and easily passed his background check to obtain his guns.
-Tucson shooter who tried to kill Rep. Giffords obtained his gun legally after passing a background check.
-Aurora shooter obtained his guns legally after passing background checks.
I could go on and on, but you get the point. You can't tell if someone is mentally ill. You can't tell if they're part of a dangerous religion or ideology. You can't tell if someone wants to shoot skeet or assassinate the president.
You might say, "Extend the length of time you have to wait," but I don't know of any shooter who bought their gun days before the event. All these shooters bought weapons weeks, months, or even years beforehand.
You might say, "make clips with less capacity", but the Texas shooter went through 15 clips. If you're trained or practiced, you can undo a clip pretty quickly.
Gun laws only impact lawful abiding citizens. 99.999% of all gun owners are like the hero who shot back and saved lives. There are NO NRA mass shooters. If guns and the NRA were the problem, with millions of followers, you'd think they were out there everyday.