SPUHR ACI & A-0023 Interface CALIPER Unlike traditional two-piece designs that

Unlike traditional two-piece designs that can experience out of alignment or loose connection

The Spektral barrel jacket is interchangeable

Tube Focus System: Smooth

An enlarged ejection port

SPUHR ACI & A-0023 Interface CALIPER Unlike traditional two-piece designs thatKit consists of one Sniper Tools ACI and one A 0023 Fixed ACI Interface (with screws) About Sniper Tools Angle Cosine Indicator The Sniper Tools Angle Cosine Indicator (ACI,) is a simple tool for snipers hunters in mountainous terrain for determining the angle to the target so that adjustments can be made to achieve the correct Point of Impact. The"Mil Spec" ACI is a vault solid, water proof precision instrument (as per US Military Specs;) quiet, and