Interesting this was a 1994 ban, yet a tec-9 was used at Columbine 6 years later. And some version of an AR-15 style gun was used at damn near every mass shooting since. It is almost as if bad guys will get bad guns regardless of their legality status. Nah, can't be that. Must be some other explanation.
This ban is all but meaningless in terms of weapons used in mass shootings. Guns can be modified by the user almost endlessly. When I was in high school a couple of friends and me modified a remington semi-auto 22 LR rifle to fire full auto. It jammed like crazy but when it worked it unloaded the clip fast. It was a tube feed and held like 15 rounds or something. We got it to unload the entire thing in a few seconds. Not hard to add stuff or modify stuff or whatever to do what most of this is trying to stop. And frankly, looking at the guns the person used in the Christian school shootings a couple look to have been modified accordingly.
The bigger problem to me is that both sides look at all or nothing solutions for the most part. The right wants all the guns, the left wants none of the guns, and neither side is trying to find middle ground to build on to actually get us somewhere. In the battle for the Next Great Soundbite (NGSB™) they just spout "NO MORE GUNS", or "EVEN MORE GUNS" and never really discuss anything else (remember it is about getting re-elected, none of these people give a flying **** about any plebes that might get shot, they just use these opportunities to rile up their base and make it through the next election cycle to continue to line their pockets and build their power). It is a meaningless fight with no real outcome in sight. Really I think we are more likely to see a dramatic increase in armed officers of some kind stationed at vulnerable locations, like schools and churches, before we see meaningful gun regulations that actually have an impact on restricting ownership for high-risk individuals.