Altra Archery .166 Insert O-Rings 12 Pack

Maintain the performance and precision of your ARCOS-equipped arrows with the Altra Archery .166 Insert O-Rings. Designed as direct replacement components for the Altra Reinforced Concentric Outsert System (A.R.C.O.S.), these essential O-rings help secure the outsert to the insert while reducing vibration and improving concentricity. By maintaining proper component alignment, ARCOS O-rings contribute to more consistent arrow flight and improved downrange accuracy.

Key Features

• Direct replacement O-rings for Altra ARCOS systems
• Designed for Altra .166 insert/outsert setups
• Helps secure the outsert to the insert
• Reduces vibration during the shot cycle
• Improves insert-to-outsert concentricity
• Supports consistent arrow flight and accuracy
• Simple replacement for routine maintenance
• Genuine Altra replacement components

Small Component. Big Performance Impact.

The ARCOS system relies on precision alignment between the insert and outsert to maximize durability and accuracy. These replacement O-rings play a critical role by helping lock the outsert in place while minimizing unwanted movement and vibration.

Properly functioning O-rings help maintain concentricity between components, which can contribute to improved arrow flight consistency and more predictable downrange performance. Replacing worn O-rings is a simple way to keep your ARCOS-equipped arrows performing at their best.

Whether you're performing routine maintenance or rebuilding your arrow setup, these replacement O-rings help preserve the integrity and performance of the ARCOS system.

Quick Specs

• Brand: Altra Archery
• Product Type: Replacement O-Rings
• Quantity: 12 Pack
• Compatibility: Altra .166 ARCOS Systems
• Purpose: Outsert Retention & Vibration Reduction

Compatibility / Works With

• Altra .166 Insert/Outsert Systems
• Altra ARCOS Components
• Altra .166 Arrow Shafts
• Fixed Blade Broadheads
• Mechanical Broadheads
• Bowhunting Arrow Builds
• Target Archery Arrows
• Custom Arrow Setups

Best For

• Replacing worn ARCOS O-rings
• Maintaining insert/outsert systems
• Reducing arrow vibration
• Improving component concentricity
• Enhancing arrow accuracy
• Routine arrow maintenance
• Bowhunting arrow upkeep
• Target archery equipment maintenance

Frequently Asked Questions

What are these O-rings used for?

These replacement O-rings are designed for Altra ARCOS insert/outsert systems and help secure the outsert while reducing vibration and improving concentricity.

Are these compatible with Altra .166 arrows?

Yes. These O-rings are designed specifically for Altra .166 ARCOS insert/outsert systems.

Why are O-rings important in the ARCOS system?

They help lock the outsert in place, reduce vibration, and improve alignment between the insert and outsert for more consistent arrow performance.

How many O-rings are included?

Each package contains 12 replacement O-rings.

When should O-rings be replaced?

O-rings should be replaced whenever they show signs of wear, damage, stretching, or reduced retention performance.

Keep Your ARCOS System Performing Like New

Regular maintenance is essential for peak arrow performance. The Altra Archery .166 Insert O-Rings 12 Pack provides the replacement components needed to keep your ARCOS system secure, accurate, and ready for the next shot.