Romney had a lot more anti-gun support in MA. Now he has to deal with the whole country and a large percentage of his base being pro gun. He wont do a damn thing unless he wants to go 1 term...which no president wants.
plus we have the house, hopefully the senate and the biggest issue is the next SCOUTUS.

Plus the big items are healthcare, economy and inflation. Immigration and oil are priorities above gun control and with the last 4word years the massive surge in gun and ammo sales sends quite the message.