Horus Vision ASLI (Angle Slope Level Indicator) with 30mm to 34mm attachment ring mount

The ASLI gives the sophisticated marksman a slope indicator and cant indicator in one hermetically sealed unit. Its slope indicator eliminates guesswork in uphill and downhill shots by helping you find true level/ground distance: simply multiply the range to the target by the cosine value shown on the slope indicator. The cant indicator is invaluable in long-distance shooting: it helps keep bullet flight true to your sighted aim. The ASLI attaches directly to your scope, is reversible to accommodate left and right handed users, doesn't need batteries, and comes with a hard rubber cap. Fine-tune your aim with the ASLI.