Maybe it's just me, but I don't think the pro groups are doing enough.
I think every single one of us wishes the pro-gun groups would "do more." But unless you believe that they're sitting on their hands or twiddling their thumbs wondering how to fill their days ...
... they do what they are able to do.
Do you have some plan for helping the pro-gun groups do more with the money and influence they have? Are you involved in their workings beyond sending in a check each year? Do you actually know what, specifically, they actually have done or are doing? If not, how do you know they should be doing "more?"
Which leads me to...
The other thing to point out, which seems to get lost in our discourses here sometimes, is that with twice the money and twice the political access, there would still be limits to what "more" these groups can do. We aren't paying them to pass legislation we like. We're paying them to speak with our voice in the ears of those who will write and vote on laws. Many other people -- including the constituents of those legislators, other legislators in their party, and other interest groups on the opposite side of the issue as well -- also get their turn to express their wishes. It is the foundation of our democratic legislative process that everyone has a chance to have a voice. Many of those voices disagree completely with us, and they have a right to influence their law-makers as well. So, no matter how much our gun-rights groups DO, they cannot FORCE laws we like to be written or voted into being.
To some very real degree, we get the laws that we, as a society, DESERVE (or at least claim to want). If 100 of your neighbors want stricter gun control and 10 of your neighbors don't -- your job is to change the minds of 90 of your neighbors. Not to grouse that the pro-gun groups didn't "do more."
Having said all that, if you do know of instances where your pro gun groups have dropped the ball -- where there was a need to speak and to use whatever influence they do have, and they missed that opportunity, or acted badly -- by all means take them to task for those specific actions or inactions!
But let's be very specific. Get involved. Find out what your gun-rights groups are spending their time and (your) money doing, and see what you could do to help them be more effective. Make your voice heard, to them, when their actions are not correct, laud them when they succeed, and encourage them when they try their very best, but the legislative process works to foil their efforts.
It is intensely discouraging to put years into an effort, have that effort fail despite your best efforts, and then have all your supporters grouse that it was your fault and you didn't do enough.