I'm saddened to hear your feelings on the NRA and its effectiveness.
While they, thankfully, haven't had to fight any big national gun control initiatives for some time, they are still very active at the state and city level. See their recent lawsuit against the City of Seattle and its new gun tax.
Well, if you want to fund lawsuits, the Washington state based Second Amendment Foundation is a better bet, and I'll bet they're a party to that lawsuit as well.
They are the only other effective one as I count them, but you have to donate money to them, a simple membership will just line the pockets of whomever is mailing out their stuff.
The value, as I see it, of the NRA is more its ability to efficiently mobilize 5 million members around key issues. I liken relying only on smaller, fractious orgs to when we had small state militias and no formal army.
While they, thankfully, haven't had to fight any big national gun control initiatives for some time, they are still very active at the state and city level. See their recent lawsuit against the City of Seattle and its new gun tax.