Shield Sights Picatinny and Weaver Mount with Height Spacers

Rail mounts are simple right up until the height is wrong. This one comes with triple height spacers, so the optic can be set where it lines up with your eye and your irons instead of wherever a fixed mount happens to put it. Add spacers and the sight comes up, take them out and it drops back down.

The body is polymer, which keeps the weight down on top of a rail where weight is felt most. It clamps to Picatinny or Weaver, so it covers the rails on most modern rifles and shotguns and a good share of rimfires. Height is the adjustable part here, not the optic pattern - confirm the footprint on the bottom of your sight against the mount before ordering, since the bolt pattern is fixed even though the stack height is not.