Are all Grendel extractors interchangeable?

[grayfox]

I’m with Grayfox, industry has pretty much standardized on Mk 136 for the 6.5 Grendel. I have spare 6.5 Grendel bolts and extractors and spares for the 5.56. From my reading bolt life is better with Mk 136 in 6.5 Grendel than AR-15’s chambered in 7.62x39 with Mk 125. For consistency sake I prefer a .136 bolt face for the 6.5 and 6 MM ARC.

One thing that really aggravated me about the 6.5 Grendel was the 6.5 Grendel II chamber designation created by Satern. It was already bad enough with confusion from 264 LBC, 6.5 CSS, 6.5 Sporter and Type I and Type II bolt nonsense. I just hate to see the 6 MM ARC get into this type of mess as it is very confusing for the general public. The 6 MM ARC success will partly be because of the success of the 6.5 Grendel and efficient case design including the .136 bolt face depth which was well engineered.

+1, that's what I'm talkin' about...