166 Insert/Outsert - 12 pack

Altra Arrows SKU: AA-SI-00001
166 Insert/Outsert - 12 pack

166 Insert/Outsert - 12 pack

Altra Arrows SKU: AA-SI-00001
Regular price $54.99
The Pinnacle of Precision & Performance™ Altra Reinforced Concentric Outset System (A.R.C.O.S.) fits our Altra Arrows 166 Shafts and are machined out of 7075-T6 aluminum for unmatched durability and performance, with optimal fit options.

The insert secures into the arrow shaft at a depth of 0.875", while the outsert then threads directly onto the insert and encapsulates the leading end of the arrow at 0.43" creating unmatched durability.  Essential rubber O-rings come pre-installed on the insert within the A.R.C.O.S., as they aid in locking the outsert in place which reduces vibration and improves concentricity between the outsert to the insert for a more precise arrow set up and down range accuracy.


  • Comes in 12 pk QTY
  • Available in four sizes - 250, 300, 350, & 400 spine
  • 50gn Total Weight
  • Accepts micro FMS insert weights
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This is the entire focus of Altra Arrows® and why it exists – so archers can consistently achieve precise accuracy with every arrow released.