ARC, Archimedes shoulder barrel prefit tennon is the same as?

[Boatninja]

I'm aware that ARC's are Savage Small Shank and will work on other SSS with a barrel nut.
I seem to remember one or more ARC shouldered barrel tenons were the same as one of the Impact actions.
Any intel on this? I could very well be mistaken.
Appreciate it!

 

[kindabitey]

Pretty sure none of the Impact prefits will fit any of the ARC actions. Impact is 16 TPI and ARC are 20 TPI.

 

[Hondo1]

If i recall you can use an Orgin barrel with a spacer that PVA used to make. Thats been a few years ago and i could be mistaken.

 

[Cascade Hemi]

If i recall you can use an Orgin barrel with a spacer that PVA used to make. Thats been a few years ago and i could be mistaken.

I believe the Archimedes has .020" less headspace than a TL3. I have a Bugnut SPR ARC barrel in a TL3 and it screws all the way down onto a G0 gage with about .005" of adjustable depth left. It should have a lot more if it were in an ARC action and it's only luck it fits in a TL3.

 

[Boatninja]

Yea, My mistake! Totally wrong action, it is Aero Solas action will fit a Zermatt Origin shouldered barrel.
I've looked at so many actions and barrels I'm getting cross-eyed, they are all running together.