The concept sound very interesting and I'm curious to hear of any experiences on reliability from those who have one. I carry a G20 for backcountry protection but figured the ASR could provide some extended range and power, if needed. TNW apparently has a "Kalifornia" compliant model with a pinned stock. Any idea on the OAL when fully collapsed?

Sorry OP, I don't really know anything about them.  But I did find this archived thread.  

http://www.ar15.com/forums/t_6_48/387756__ARCHIVED_THREAD____The_new_TNW_Aero_Survival_Rifle_____first_range_report__and_pictures__Now_with_Updated_info_.html&page=1

All the posts on TNWs have been pretty positive but I've not seen anyone post on the 10mm version.

I looked at a TNW in .45 before I bought my JRC (.45 gen II). Although I get great results accuracy wise from my JRC it took a lot of mods with the mags to get it to run right. There were times I wished I'd gone with the Aero. JRC seems to have no plans to roll out a 10mm rifle so the Aero & Theuron Defense are the only sources for a PCC that takes AR accessories.

I'm curious as to how the blowback setup works with a round as hot as 10mm. Mechtechs do it but they're HEAVY. JRC claims their .45acp carbine isn't equipped to handle the 10mm.

Being able to swap calibers is a big plus as well.

Apparently the TSR in 10mm was introduced earlier this year and it shares the same lower as the .45 model, i.e. so conversion is possible. I also looked that the JRC but decided on a New Frontier 9mm setup. Mechtech here in California is a no-go since swapping back and forth between carbine and pistol is a felony, hence my interest in the TSR.

Thanks for the link. This gives an idea about the TSR overall, but it predates the 10mm version.