Grendel Manufacturers

[Drifter]

And this is so newcomers can sell a "Grendel" upper without paying dues to AA? Does anyone have a link or thread for Grendel newbies?

I think the 6.5 Grendel trademark has been released, the cartridge is now SAAMI approved, and any manufacturer can pursue production.

Previously, it was probably protected to prevent chamber and cartridge dimensions from getting distorted and changed, which might have been detrimental to the long-term success and survival of the cartridge. The "variants" were a way around the protection, but not sure that any of the variants have been tested to the degree that the Grendel has. Safest bet is the real 6.5 Grendel, but that's not to say that the others don't work.