Are all Grendel extractors interchangeable?

[grayfox]

For me the issue comes down to interchangeability and whether a third "spare" bolt requirement becomes necessary. If the 6Arc bolt can be same dimensions as the Grrr then if/when I need to swap one in because of breakage or malfunction, I can keep the one spare for both calibers. And if by mistake the 6Arc goes into a Grr barrel no harm no foul since headspace will be maintained. OTOH a 0.125 6Arc bolt means I have to keep it scrupulously separate and buy a separate (now third) spare, keeping it separate also from my 6.5 monster bolts.
Same thing with extractor claws, they will need to be kept separate and require the third spare issue.
Because no matter how well something is made (I have only had the one Grr extractor fail in my years), parts do fail and you need to have on-board spares. Even more so as we head into more 2A headwinds.

I remember the earlier issues with the older toolcraft Grendel "short-bolt", which again set up interchangeability issues. I ditched that one that I had in favor of the standard style Grrr (ie, Monster) bolts.