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Trending 166 Insert/outsert - 12 Pack Perfect For Gifting [o6bgfCur]

$18.99 $60.99 -69%

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 inse

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Trending 166 Insert/outsert - 12 Pack Perfect For Gifting [o6bgfCur]

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.

Features:

  • Comes in 12 pk QTY
  • Available in four sizes - 250, 300, 350, & 400 spine
  • 50gn Total Weight
  • Accepts micro FMS insert weights

What Our Customers Say

January 26, 2026

Absolutely no complaints!

The user experience has been nothing short of perfect.

- August R..

January 26, 2026

Absolutely no complaints!

This is a fantastic example of modern, user-focused design.

- Cassidy L..

January 26, 2026

Absolutely no complaints!

It feels like it was custom-made for my needs. Perfect fit.

- Jett I..

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