Well,
As for the Glock and AR parts (or 1911 for that matter), the patent protection period has expired. You get 20 years max, then the protection lapses. Glocks, ARs and 1911s, at least in their basic forms, are too old for protection.
As for RiffRaff's point, I disagree. When someone puts their hard work, innovation and money into coming up with a patentable design, they should get the 20 years of profit off of it. That has been part of the free market system for a long time. Why should I bother to develop a product if someone else can swoop in, mic my parts, and start producing knock-offs?
If Bryce has done something innovative and incorporated the Rohrbaugh protected design, then he should negotiate to license the design and pay an appropriate royalty. If he is just using a CAD program to reverse engineer a design and produce it in a different material...then I am not sure that he really has anything to sell. No disrespect intended to Bryce. Producing a stainless R-9 is certainly not beyond Karl's ability --in fact, they already did it once.
This is a pretty clear cut situation. The only cage that will get rattled is Bryce's if he is infringing.
Perhaps in 2025 everyone will start manufacturing Rohrbaugh knock-offs.