Here you go again, conflating zero incidents with a sharp rate reduction.
From 1994 when the ban was passed until the end of the decade there were 11 mass school shootings (including universities) across the country including the one at Columbine. As I said before, handguns were the dominate weapon of choice.
To get to 11 school shootings you would have to go as far back as 1974, 20 years, to count the same number of school shootings up to the 1994 ban.
So... from 1974 to Sept 1994 there are 11 school shootings, but from October 1994 to December 31st 1999 there's another 11. It could also be argued that one of those shouldn't be included: The 1985 incident at Murray Wright here in Detroit. A nigga got jumped and came back during a football game and blazed at the niggas that jumped him. If you remove that one, then you gotta go back to 1970 with the Jackson State shooting.
Bruh... Your "reduction" math ain't mathin'.
After the ban expired in Sept of 2004??? We don't see a single school shooting until 2006. And, once again, the gun used to commit the murders was a handgun though he brought two others (neither of which was an AR15). There's only one other school shooting in the 00's after the ban expired: Virginia Tech where, yet again, the guns of choice were handguns. In order to get to the same 11, you gotta go from 2004 until 2016 with the Townville Elementary School shooting. Shit, you got whole years in there with no school shootings at all. In fact, one of the shootings, the 2014 shooting at Rosemary Anderson High, cops had declared was fuckin gang related, so we could throw that one out which would extend us out to 2018 because there were no school shootings in 2017 at all.
And guess what??? From the time the ban expired in 2004 until we hit that 11th school shooting on January 23, 2018 only ONE used an AR15 and that was at Sandy Hook; all of the others used handguns.
But.. "ban AR15's and mythical 'assault rifles'"