No, these were the FN chrome lined barrels, phosphated on the exterior.
This version..............when I got them they were on sale at $459. The retail for the Geiselle rail is $300 & you can usually find them for $250'ish whenever Geiselle has a sale.
PSA UpperI used Griffin Armament BCG's & the headspace was good at .002" over minimum, which is right about where I like to see it.
One went on an Aero lower, the other went on a PSA lower & both were an excellent, snug fit with no looseness at all.
MM