I always try to make an effort to answer and keep the discussion alive.
Welcome to DU and the group.
While an appeal process is a good thing, the list is not. The more we become reliant on laws with a bad foundation, the further we are from the idea of good government.
As for the need for self-defense and to lay a proper foundation, self-defense is more than a need, it is a right. IMHO governments everywhere need to take rights more seriously. I decided not to carry (after a deliberate and careful assessment.) I don't feel that my assessment is universal nor do I feel that government review and approval of the assessments of others is reasonable.
The purpose of the Sig Sauer MCX used criminally in Orlando is the same as every other semi-auto rifle. The US has a very long, involved, intrusive and expensive process for the acquisition of full-auto weapons. In addition private citizens are not eligible to own any full-autos manufactured after 1986. I don't agree with that restriction but it's not material to this discussion. In the US small arms rifles are available to the average person if they are either single shot/non-automatic or if they are semi-automatic provided they are .50 caliber or under. The presence of pistol grips, folding stocks, being black in color, having a bayonet lug or a hook to hang your lunch bag not withstanding does not and should not change that. AR-15 style rifles are adaptable to various configurations and accessories. Whether you fold the stock or paint it black, brown or green, the functionality of the gun remains the same.
The idea that "assault weapons" are different (deadlier) than other semi-automatics serves, IMHO, as a distraction. Some politicians and gun-control proponents have latched on to that, in some cases, simply to drive another wedge between their ideologies and those of RKBA proponents. It is a tactic used since history began. That tactic is counter to making any progress relating to gun-control. Many of the leaders on both sides of that controversy are fine with that. Clearly the RKBA leaders are happy with the impasse since new laws are not forthcoming and contributions to their cause are continuing. Pro-control leaders are seeing media attention and contributions. A side thought of mine: it is no accident that the pro-control leaders have settled on AR-15 style platforms to target for restrictions as "assault weapons" since they are currently the most popular selling civilian rifle in the country.
Assault weapons = diversionary circus.