The rampage was done with plain jane semi-automatic pistols (.22LR and 9mm). No fancy mean-looking "automatic assault weapons" here.
You obviously know nothing about firearms, because anyone who's had any experience with them knows most automatic small arms expend ammunition needlessly whilst being hard to control at anything past point blank ranges. Automatic weapons only become useful when mounted on a tripod/bipod or a vehicle and used in a crew-served role.
You also obviously know nothing about the Brady Bill, which had nothing to do with automatic firearms (which have been strictly regulated since the earlier half of the 20th century). The Brady Bill merely regulated features of firearms such as magazine capacity, bayonet lugs, and how much a legal semi-automatic firearm -looked- like an evil scary-looking "assault weapon".
You are obviously a clueless idiot, so stop mouthing off about something you know -nothing- about.