Altra 166 Insert O-ring 12 Pk.

The Pinnacle of Precision & Performance Altra replacement O-rings for the A.R.C.O.S. are essential in the insert/outsert system as they aid in locking the outsert in place, reducing vibration and improving concentricity between the outsert to the insert for a more precise arrow set up and down range accuracy.

Features:Comes in 12 pk QTY