.166 Insert Replacement Orings

The Pinnacle of Precision & Performance™ Altra .166 Insert Replacement Orings deliver essential functionality for your A.R.C.O.S. insert/outsert system. These precision-engineered O-rings secure outserts firmly in place, effectively minimizing vibration while enhancing concentricity between components. The result is superior arrow setup integrity and measurably improved downrange accuracy. Each package contains 12 replacement O-rings, ensuring you maintain optimal performance across multiple arrow builds. Critical for serious archers demanding consistent, competition-level precision.