Precision-machined instrument made of aircraft-grade aluminum for adjusting scope elevation, featuring an orange needle to indicate the percent the rifle is off level.
Compatible with Picatinny and Weaver-style rails using an aluminum mount (sold separately) or can be clamped in an extra Weaver-style ring on the scope tube.
Mil-Spec version of the Cosine Indicator is waterproof, enduring 35 minutes at 1 meter depth, with a 1" diameter dial and .75" thickness.