While the AR10 and AR15 are nearly identical weapons, the AR15 gets all the news

[Kaleva]

35. Threads and posts specifically mention the AR-15

Here are some examples of recent OPs:

https://www.democraticunderground.com/100216758175

https://www.democraticunderground.com/100216757786

https://www.democraticunderground.com/100216756472

https://www.democraticunderground.com/100216756045

I've been looking but can't find any posts about the more powerful AR-10.

As for mass shootings, the one instance that I found, so far, I'm still looking for other cases, where AR-10s were used was the Las Vegas shooting but most of the guns he had were AR-15 style guns and he made most of his shots from the AR-15s.

"With frequent help from hotel bellmen, he brought five suitcases to his room on September 25, seven on the 26th, two on the 28th, six on the 30th, and two on October 1.[15][9][8] His arsenal of weapons, associated equipment and ammunition included fourteen AR-15 rifles (some of which were equipped with bump stocks[d] and twelve of which had 100-round magazines), eight AR-10-type rifles, a bolt-action rifle, and a revolver.[16] On September 30, he placed "Do not disturb" signs on the doors of both rooms.[15]"

"The AR-10 rifles were equipped with various telescopic sights and mounted on bipods.[78][83][84] Paddock was found to have fired a total of 1,058 rounds from fifteen of the firearms: 1,049 from twelve AR-15-style rifles, eight from two AR-10-style rifles, and the round used to kill himself from the Smith & Wesson revolver.[27]"

https://en.wikipedia.org/wiki/2017_Las_Vegas_shooting#Weaponry

The apparent fact that mass shooters don't use high powered rifles like the AR-10 is probably the reason why no one here, that I have ever been able to find, has specifically called for them to be banned. A number of hunters like them because they, the AR-10s, are chambered to fire rounds used to hunt game such as deer, elk, big horn sheep and such.