I have 4 of Nikon Monarch 4-16. 3 of em are the 42, and the one on my AR is a 50mm. I love em, and I hate to start up some crap, but I ebayed all of my high dollar VX 3, and VXL after I used a Nikon. Use google shopping and you can prolly get a refurbed one from 300-400. I dunno if they make em in mil dot. . . .I use the elevation knobs.
Just my .02
Just my .02