It has a simple set-screw in the top of the elevation turret that you tighten-down after zero'ing the rifle, then you tighten the set screw on the side of the turret to keep that top one from backing-out, so it holds your zero stop in place. It's the same zero stop as the Arkens. Simple in design, solid wall (not spongy), and nearly idiot-proof. The way it's designed, it doesn't eat up any elevation out of the turret.
Here's a 45 second video on YT that shows you how to adjust the ZS for both Arkens and DNT's.
I’ve never messed with Arken, but that sounds solid.