Altra Archery .166 Phantom Insert/Outsert 12 Pack

Built for archers who demand maximum durability and precision, the Altra Archery .166 Phantom Insert/Outsert 12 Pack features the innovative Altra Reinforced Concentric Outsert System (A.R.C.O.S.). Specifically engineered for Altra Phantom .166 arrow shafts, this advanced insert/outsert system combines a deep-set insert with a reinforced outsert design to improve durability, concentricity, and downrange accuracy. Machined from premium 7075-T6 aluminum, ARCOS delivers exceptional strength while maintaining consistent arrow flight performance.

Key Features

• Designed specifically for Altra Phantom .166 arrow shafts
• Advanced Altra Reinforced Concentric Outsert System (A.R.C.O.S.)
• Precision machined from 7075-T6 aluminum
• Deep insert engagement for enhanced durability
• Outsert encapsulates the leading edge of the shaft
• Pre-installed O-rings help reduce vibration
• Improves insert-to-outsert concentricity
• Engineered for enhanced downrange accuracy

Maximum Strength Meets Precision Engineering

The ARCOS system utilizes a unique two-piece design that combines the advantages of both an insert and an outsert. The insert secures deep inside the shaft at 0.875 inches, while the outsert threads directly onto the insert and encapsulates the front of the arrow shaft for added protection and structural integrity.

Integrated rubber O-rings come pre-installed to help lock the outsert securely in place. This design helps minimize vibration while improving alignment between the insert and outsert, creating a more concentric arrow setup for improved consistency and accuracy.

Constructed from high-strength 7075-T6 aluminum, the ARCOS system is built to withstand demanding hunting and target shooting applications while maintaining optimal performance shot after shot.

Quick Specs

• Brand: Altra Archery
• Product: Phantom Insert/Outsert
• System: A.R.C.O.S. (Altra Reinforced Concentric Outsert System)
• Quantity: 12 Pack
• Material: 7075-T6 Aluminum
• Total Weight: 56 Grains
• Arrow Compatibility: Altra Phantom .166 Shafts
• Insert Weight Compatibility: Non-Micro FMS Insert Weights

Available Spine Options

• 250 Spine
• 300 Spine
• 350 Spine
• 400 Spine
• 500 Spine

Works With

• Altra Phantom .166 arrow shafts
• Hunting arrow builds
• Target archery setups
• Non-micro FMS insert weights
• Fixed blade broadheads
• Mechanical broadheads
• High-performance arrow systems
• Precision arrow tuning setups

Best For

• Building durable hunting arrows
• Increasing front-end shaft protection
• Improving arrow concentricity
• Enhancing downrange accuracy
• High-performance arrow setups
• Long-range shooting applications
• Bowhunting
• Target archery

Frequently Asked Questions

What arrows are compatible with the ARCOS system?

The ARCOS insert/outsert system is specifically designed for Altra Archery Phantom .166 arrow shafts.

What material is the ARCOS system made from?

Each insert and outsert is precision machined from premium 7075-T6 aluminum for exceptional strength and durability.

What is the total weight of the insert/outsert system?

The complete ARCOS insert/outsert assembly weighs 56 grains.

What do the included O-rings do?

The pre-installed rubber O-rings help secure the outsert in place, reduce vibration, and improve concentricity between the insert and outsert.

What type of target is recommended?

Altra Archery recommends using foam-style archery targets when shooting arrows equipped with the ARCOS system. Bag-style targets may cause the outsert to become stuck, potentially damaging the arrow or insert/outsert assembly.

Engineered for Accuracy and Durability

Whether you're building premium hunting arrows or fine-tuning a precision target setup, the Altra Archery .166 Phantom Insert/Outsert 12 Pack delivers the strength, alignment, and consistency serious archers demand from every shot.