The times they are a'changin. You will see. There is broad agreement on 100% backround checks even among NRA members. There is a forming consensus in America that will grow over time.
Eventually, assault weapons will be declared illegal, and eventually, they will be taken from you, either voluntarily or by force.
Just as with gay rights and immigration, you're living in the past. America is different from the one you grew up in the 1950's, and you resist it daily.
But there are inevitable social changes in the world, and just as your party is in the process of caving in on both gay rights and immigration, folks like you will keep the hatred alive, thus ensuring that your party will be so divided that Democrats will sweep elections.
Hillary all but announced the other day. You don't have anyone who can match her stature. You've got loud mouthed midgets!!
NRA members and gun enthusiasts in general are one issue voters, and roughly half are Democrats. Gun-grabbing is a political death sentence for a politician in a competitive district.