The NRA does not allow people to have firearms at NRA conventions. They blame this on the city or the venue.
The NRA is on national television telling us that more guns make our society safer.
If that is really true, and they really believe it, why don’t they encourage people to tote their guns to their meetings? They’d be the safest meetings of all.
The fact is that at least since 2010 their conventions were held in a place where attendees had to pass through metal detectors. Guns were forbidden.
Edit Correction 5/28/14: Someone commented below that I am wrong and at least at the 2013 convention carrying of firearms was allowed. I guess I was misinformed. My apologies for that.