So what? 2A is prima facie self-binding on the States as well as the federal government, and is bound to the States by 14A as well, very expressly.
I should think they're playing to Democratic voters more than trying out con-law dodges to get around 2A. They will not succeed at that.
The pattern right now is "No Provision" states going batsh*t crazy on gungrabbing:
New York, California, New Jersey (Demmie state legislators foaming at the mouth to get Christie to DO SOMETHING!!!), Iowa (the other Demmie whackjob state legislator), Maryland (we'll get something hilarious out of them).
They want a stampede.