The Midas BTR is SFP so the subtensions are only correct at one magnification.
For all that is right and good, lol, save up and get a Midas TAC, it's a better scope than the SWFA in a few ways and way better than the regular Midas.
I'm not enthused with the reticle in my TAC 4-16 but it's still a decent reticle, the rest of the scope is quite impressive.