There is a lot to debunk and correct throughout the rest of the article. A few general comment followed by the specific proposals. 

(1) Bump stocks should be grandfathered and outlawed. Although not as effective as an automatic weapon, there is no compelling reason for these devices to exist for the same reason automatic guns are banned since 1986 and heavily regulated since the 1930s in the US.

(2) The NRA in terms of spending on political races is a small drop in the ocean and their vice like grip on GOP politicians is grossly overstated in the general context of "lobbying money". Certainly compared to Planned Parenthood and the like...suggesting that more is at play when it comes the gun-control than political funding (like voter support for the pro/anti gun control policies).

(3) The statistics simply doesn't correlate with more guns = more gun violence, more homicides, gun control working (low compliance rates) and get over the fact that criminals and murderers break laws.