At some point there is some market saturation. Except for real collectors, how many firearms do people really want to own? A couple of pistols, a shotgun or 2 , and AR type rifle or 2 and a couple of hunting rifles if you hunt. Guns don’t generally go bad and technology is not really progressing much to make one firearm vastly superior warranting an upgrade.
After several years of soaring sales and the Supreme Court reigning in gun control and very little talk of gun control as the election nears, a slow down should be expected.
I have enough weapons, but in the past two years I bought a few. And I stocked up on reloading supplies for everyone in our family. It took quite a while to accomplish that, supplies of components until about 6 months ago were very tight in some areas. You can get almost everything now, but the prices are a lot higher in general..