During a visit, the difference between “acting” and “acting out” necessarily comes to mind. Why is there no stream of gripping films about the thousands of troubled Americans with easy access to guns who can lethally act out their darkest grievances on family and society day after day? Shooters nowadays must rise above the B-movie level to get noticed amid the 30,000-plus annual toll of gun death. They need a different twist in motive or a record-high death toll — or maybe the live delivery of death on Facebook, as happened last week — to jolt a jaded public. Inert politicians, of course, remain far more sensitive to the gun lobby than to routine gun mayhem.

The N.R.A.’s latest priority is rooted in its ultimate fantasy that society will be safer if ordinary Americans are allowed to routinely pack a pistol. The organization is pushing Congress to pass a national concealed-carry reciprocity law to make it easier for people with state concealed-gun permits to carry their firearms nationwide. This is part of the campaign to make gun possession ubiquitous among ordinary citizens. All states permit some concealed carry, but under vastly different safety controls. That is why opponents wisely fear that national reciprocity is a ploy to sell more guns and undermine stronger local and state gun controls.

Gun safety researchers count more than 900 people killed by concealed-carry gun owners in the past decade, with only a tiny fraction of shootings ruled self-defense. Many of the deaths were suicides, and 31 were in mass shootings by concealed-carry owners. The gun lobby disputes all of this, but nevertheless opposes detailed public health research, perhaps because people could then see exactly how this nation’s gun toll dwarfs that of other democracies.

The N.R.A. headquarters here keeps up a fresh drumbeat for the reciprocity legislation underway in Congress, 30 minutes away from the gun museum, with more than 160 co-sponsors signed up. President Trump, who supports the idea, is scheduled to address the association’s annual leadership forum on Friday in Atlanta. Both sides in the gun debate are keyed up for something John Wayne-like from the president.