Some examples of the USN and DoD Contract 6mm ARC rifles appeared on TFB a few days ago

https://www.thefirearmblog.com/blog/2023/01/30/shot-2023-geissele-gfr-maritime-recce-stratomatch-6mm-arc-rifles/

Some info from Shot Show.  Geiselle rep says they developed a new magazine specifically for 6mm ARC.

YouTube

Geissele Automatics | New BORTAC Rifle and more 6MM ARC Goodness! | SHOTShow 2023

Andrew stops by the always entertaining Geissele booth to hear about ANOTHER contract they won with their rifles.Visit BCM!https://bravocompanyusa.com/Follow...

stancrist said:

new magazine specifically for 6mm ARC

That will be a big improvement if they have a reliable 30rd,

gatnerd said:

That will be a big improvement if they have a reliable 30rd,

That will be astonishing if they have a reliable 30rd.

I shall be very surprised if capacity exceeds 25 rds.

I didn't hear it, but maybe they pulled an LWRC and used a larger magwell for a slightly larger mag?

Looks like a standard (M4/M16/AR15) magwell.

Thanks!

No i am certain they are talking about the magazine itself. So far 6ARC mags are unobtanium, and even 6.5Grendel mags are mostly just 6.8SPC  stamped bodies with different follower , I know the E-lander also anounced their new 6Arc mag , but the samples i have from them all look like 6.8 SPC ,6.5Grendel ,6 ARC use same magazine bodies , have yet to see any new 6 ARC. 

And yes they will likely be 24rd like all grendel mags as that is similar size as 30rd 5.56 mag , 30rd Arc mag would probably be near 40rd 5.56 size

Knew I had read 30 somewhere.

https://soldiersystems.net/2023/01/17/shot-show-23-geissele-unveils-dedicated-6-arc-rifle-and-magazine/

Farmplinker said:

I didn't hear it, but maybe they pulled an LWRC and used a larger magwell for a slightly larger mag?

That would be the smart thing, but some far every single gun company other than LWRC (and FN's recent .264) has been too lazy to do this, no matter how well funded.