They're about rebuilding the declining profits of the arms industry and supporting politicians who will do the gun industry's bidding. Then they spin the constitutional proposition that the public has no right to legal protection from the senseless carrying of weapons in public places. Safety and sports come in a weak fourth in their agenda, at best, since these are programs of moderation. The gun crowd does have a legitimate gripe with the left-wing zealots who are as willing to prostitute themselves for funds to influence politicians as the right wing. When it comes to the un-ethics of fund raising, there is more quicksand on the side of the left, which has only two reliable sources of money for this kind of shenanigan, the trial lawyers and the entertainment industry.
Trial lawyers support anything that creates profit from litigation.
The entertainment industry supports anything that backs it in the production of the violence and debauchery that create profits. The entertainment industry provides training and motivation for sick minds, while the arms industry provides the guns to act out the sick minds' compulsion to violence. So really, it's a joint venture. Only the politicians who support the people in the middle make efforts to establish a path that goes neither to the left nor to the right. But being in the common sense middle where people want reasonable control on gun sales and carrying, and reasonable control of the entertainment industry's violent, sadistic and sexually oriented material, and reasonable control of excessive litigation, doesn't bring in a lot of campaign money.