I'm getting very tired of this. If you want to have an informed discussion about gun violence you need to acquire at least a modicum of information about firearms, especially but not limited to different actions, e.g., single-action, semi-automatic, and automatic.
Virginia Tech? 2 semi-automatic pistols. Sandy Hook? 1 semi-automatic rifle and 2 semi-automatic pistols. UT Austin? 1 semi-automatic shotgun, 2 bolt-action rifles, 1 pump-action rifle, 2 semi-automatic pistols, 1 revolver, 1 semi-automatic carbine Columbine? 1 pump-action shotgun, 1 break-action shotgun, 1 semi-automatic carbine, 1 semi-automatic pistol.
What do those have in common? No automatic weapons.
Almost no crimes are committed with legally owned automatic weapons. There are very few of them available and many are quite old, so those owned by non-LEAs are very expensive and largely collectors' items. And even with illegally owned automatic weapons, crimes committed with them barely even register. [1]
If you want to argue that semi-automatic weapons are "bad enough," fine. But please have some idea what you are talking about.