Wide top straps hold zero under the most jarring recoil. Loosen the thumb nuts and you can go to iron sights in seconds. Remount the scope and you are back on zero.
Weaver base is machined to the tightest tolerances for a custom fit. They are designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver detachable ring.