gone Noveske custom barrel assembly with pinned FSB and intermediate-length gas tube, for their unique gas system. Had them turn the barrel custom to accommodate the FSB, these are not available now, ever, and i don't believe they've taken custom small orders like this in a while.. so if you're in to fixed FSBs on precision barrels, this'd be the one for you. if not, shaved FSBs are the most reliable gas blocks.. less than 150 rounds fired In Saint Helens, OR - $400 FTF in the Portland area. WA doesn't allow my guns, therefor they dont allow me.. so I'll need to meet WA people on this side. thanks! ETA- also willing to do partial trade for select lower receivers, and other things.