Two points (with the caveat that I have not read Rare Breed’s patent):
First, having a patent doesn’t necessarily mean no one else can make the same class of product. There are usually ways to design around a patent, especially if you are not the original pioneer of the technology. Supposedly a Mr. Graves has worked on similar tech for close to 50 years, so I doubt Rare Breed’s patent is so broad as to prevent all other forced-reset trigger designs.
Second, patents vary wildly in quality. Some are barely worth the paper they are printed on due to poorly drafted claims or validity issues. For instance, those companies advertising cheap patent preparation services on the internet usually do not deliver a great product. Again, I wouldn’t assume just having a patent means they’ve got the market boxed out without closer examination.
Like you, I do admire that Rare Breed fought back in court and seemingly won. SCOTUS’s bumpstock decision probably reinforces that forced-reset triggers should not be banned. I hope they have a robust patent and are rewarded for their efforts.