Okay so I'm seeing a lot of discussion online with guns rights activists saying that the reason the attack stopped was that a guy at the second mosque had a gun on him and fired at the shooter, scaring the shooter and ending the attack. The story I got, (which I'm not gonna claim is 100% accurate), is that the shooter dropped and empty shotgun sometime during the attack at the second mosque, and one of the mosque members picked up the dropped shotgun, pumped it, and pointed it at the shooter, scaring the shit out of them. So that sorta debunks the "good guy with a gun ended the attack theory" and replaces it with "good guy picked up the dipshit's gun and scared them shitless"

(Take all of this with a grain of salt, information is shaky)