Reinforced concentric outset system (AR COS) ensures optimal fit and concentricity for precise arrow flight
Machined from 7075 T6 aluminum for maximum durability and performance
Pre-installed rubber O-rings lock the outsert in place, reducing vibration and improving accuracy
Compatible with Altra arrows 204 shafts and accepts micro FMS insert weights
Available in multiple spine sizes (250, 300, 350, 400) to suit various archers' needs
Summarized by Shop
The Pinnacle of Precision & Performance™ Altra Reinforced Concentric Outset System (A.R.C.O.S.) fits our Altra Arrows 204 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 direc
