Maintaining proper stock-to-shoulder fit in the real world of flushing pheasants, quail, grouse and fast-flying waterfowl can be tough. So why not stack the odds in your favor with addition of a Speed Bead. The Speed Bead allows both the target and the 4 MOA red dot to remain in focus during the shot. The optics position on the sight plane eliminate the need for perfect left/right/ up/down head position. It has an amazing 3-1/2" to 4-1/2" of eye relief, so there is no reason to worry about your eyebrow running into the sight nor any interference with your gripping hand. To install, simply take off the butt and position the sight directly between the butt and receiver. Place it directly in line with the ventilated rib and shoot away. Operates on one CR-2032 battery (included).