Putting the MARS on the little single-shot .22 was a joke. The sight was too big and it sat much too high over the bore. The little Lucid M7 is smaller and much cheaper and so a closer match to the survival rifle. It’s still waterproof and the dot-circle reticle allows for rough ranging and bullet drop compensation.
The other recipient for the sight is Barrett REC7 in 6.8mm. The rifle feels very light but that’s mostly the result of a good balance. It’s not front heavy like too many ARs.
new HD7 with capped turrets would be more appropriate for the AR, but I’ll have to post the photos of that later.