I’m using the UNV dloc on my pulsar. I have it torqued to 44 inch pounds as it did come loose when I first switched to it from the original. 44 inch pound is what manufacturer told me to use if I wanted it go past finger tight. I don’t know why my scope started shooting low. Could be warmer weather, and I just switched to a new lot of powder, but I checked it on another gun, had to bump the charge 1/10 to get same velocity so it shouldn’t have been ammo? Who knows? I do have the newest firmware that is supposed to fix temp issues with this scope installed. Who knows. But it’s back on now Scope lives on this rifle. I never tested its return to zero. After it came loose that first time I torqued it so I could “set it and forget it”. I do routinely take my PTS233 off my 9mm AR and switch it out with my aimpoint comp M4 for day/night use. Both scopes return to zero almost perfectly at 50 yards. I have no doubts the dloc on the pulsar will do the same, I’ve just not tested it. Someone suggested using the larue index clips in front of the optic. So you could find it in the dark and to get it in the same slot each time. I’ve got them on my 9mm and they are helpful.