That looks an awful lot like an FS model (Fiberglass Stock), not a KS Kevlar Stock. The ADL configuration, rough matte finish on the rifle with a matching matte finish on the bolt are hallmarks of the FS line. Not that it's a bad thing, the FS models came with a Brown Precision stock and were always one of the sleeper deals in the Remington line, plus they were made when Remington was still at the top of their game.
I've had two of the FS models but am definitely not an expert on the KS line so it certainly could be a custom shop KS, I'm not seeing obvious roll marks on the barrel so that lends some credence to it. But I'd politely question the seller about his bona fides that this is a genuine custom shop rifle. If it really is and only has 18 rounds through it then $1600 is actually a pretty good deal, even before these CSHTF times.
