The Sig 400 is nice. I was looking at building a short .300 and walked into my local Crack dealer and he had the Sig sitting on the counter. Has backup sights and the Sig brace on it for $1300. Hard to build one with quality parts for that. Thinking of picking it up and getting the SBR stamp and might as well get a .30 suppressor while I still can use my trust the easy way.
You might be onto something with that one.
Travis