Don't Let A Tilted Gun Ruin Accuracy
Mount this fold-away level on your scope tube and be certain the
crosshairs are as carefully aligned as they were when you sighted
in. Just a slight amount of tilt can throw a shot off-target and the
longer the range, the worse the error. The Scoplevel is visible just
above the reticle where your sighting eye can check it easily
before every shot.
Big Book Catalog, Issue:66, Page:274
SPECS: Black plastic. 3-3/4" (9.5cm) extended height.