About the TIRCP
The TIRCP was conceived when the brain of an engineer wanted a product that didn't exist. Over the years I have used a large variety of vertical grips and hand stops, but one by one I always ended up removing them in favor of a slick handguard. I just felt that they all interfered more than they helped.
Eventually it dawned on me... my thumb is doing most of the work in keeping muzzle down and where I want it, why not lean into that? Thus the TIRCP was born.
After a lot of prototypes, testing, and user feedback the designs became what they are now.