I've only got a couple mags through it, about one mag was in prone and in my opinion it works fine for me.Very nice setup. How does the tall mount work in prone?
Honestly If I was putting together a 20 inch DMR I'd probably go with a traditional mount for a more concealable position.
I had the mount ( ADM qd ) on a 14.5 but repurposed it to the new 16 here, It just came in the mail.the other day but so far so good