Satern “Grendel Type II” barrels…that would be a hard pass for me.Have you looked at grendelhunter.com?
There was quite the kerfuffle with this guy a few years back on 65Grendel forum.
I bought one of the Lilja SBR group buy barrels a few years back as well. There was an issue with reamer used to chamber the barrel. I sent mine back to get a proper Grendel chamber done with Manson reamer.
Precision Firearms is a solid choice.