I think something more nefarious is going on here, like weapons dealers using the run on guns to drive up an artificial premium on firearms and ammunition,
Firstly, if there is a run on something...the dealers aren't artificially setting prices, demand goes wayway up supply stays the same, prices go up, basic free market economics.
Secondly, the NRA is going to do what the NRA does. That is to say they are certainly out there lobbying whether or not it makes the news. More importantly however is why should you rely on them to protect your rights? As I said in a previous thread, it's great that we have groups like the NRA lobbying for our interests. However, in the end politicians are not accountable to the NRA, they're accountable to us the voters. It's much more critical that the politicians hear from us, the voters, than any organization lobbying for us.