Read the article, and then read the comments. When you hear "all we want is common-sense gun control," you'll know what they're referring to. When it comes right down to brass tacks, there really isn't any room for compromise or negotiation.
https://www.nytimes.com/2018/03/27/opinion/john-paul-stevens-repeal-second-amendment.html
https://www.nytimes.com/2018/03/27/opinion/john-paul-stevens-repeal-second-amendment.html