I'm a member of the NRA so I can read the American Rifleman and see every month how they are stopping the anti-gunners. Maybe you can borrow a copy and see for yourself. If you're not happy with the NRA, don't join. Spend all your efforts with another group instead of complaining about a group you have nothing to do with. Causing division and hoping for a "divide and conquor" strategy is the anti-gunner's dream. Don't do it for them.
My solution is to not complain, join them all.
These groups are fighting for what we want. They may not do it exactly as we want but they are doing something.
The day I hear that one of these groups has become anti-gun I will resign from it.
Until then, my measely little contribution along with your contribution along with anothers...etc...puts money into the pro-gun lobby.