The gun is pretty simple, solidly built device. Hardened steel, not too complicated mechanism. It’ll last a lifetime if you take good care of it (actually several lifetimes-- I have friends who own working rifles once owned by their grandfathers), the basic principle of the repeating firearm hasn’t changed in a hundred years.
This is good for the gun owner, but bad for the gun industry, like if Duracell offered a battery that lasted a decade with regular use.
The NRA represents the gun industry, not the gun owners. They want people to buy 20 guns and a garage full of ammunition, even though nobody really needs either in a relatively peaceful civilized democracy. I’ve lived in the city, I’ve lived in the suburbs, I’ve lived in the boondocks, and in my entire life I can’t think of any moment when I thought a gun was needed or would improve a situation.