Altra 166 Phantom Limited – Kauffman Custom Build

Lighter GPI Micro Carbon. Upgraded Phantom A.R.C.O.S. System. True `±.003"` Value.

Engineered for western bowhunters seeking higher arrow speeds, flatter trajectories, and high Front-of-Center (FOC) potential without sacrificing structural toughness, the Altra 166 Phantom Limited represents Altra’s next evolution in micro-diameter arrow technology. Featuring an advanced, lighter carbon layup than the Centrum line, the Phantom Series drops overall grains-per-inch (GPI) weight while maintaining high structural rigidity. Built with Altra’s signature NO SPINE™ Technology for 360-degree radial consistency and paired with the re-engineered Phantom A.R.C.O.S. insert/outsert system for maximum front-end concentricity, this ±.003" shaft is a high-velocity, broadhead-steering powerhouse.

At Kauffman Custom Archery, we take Altra’s lightweight micro-diameter carbon and execute our full studio bench prep, turning bare shafts into broadhead-ready, pin-point hunting projectiles.

The Kauffman Custom Studio Difference

Micro-diameter .166" shafts with lightweight carbon layups require precise shop prep to prevent front-end runout and broadhead flight errors. We eliminate factory assembly variables through a dedicated bench workflow:

Radial Indexing & Verification: Even with Altra’s seamless NO SPINE™ construction, we spin-test every shaft on precision rollers to verify dynamic stiffness and index nocks for uniform flex out of your bow.
Dual-End Diamond Squaring: Both carbon ends are trimmed and precision-squared using diamond wheels, guaranteeing a 90-degree flush seating surface for Altra’s upgraded Phantom A.R.C.O.S. insert/outsert system and Nexum nocks.
Custom Hand Fletching: Shafts are thoroughly degreased, fitted with heavy-duty Onestringer custom wraps, and hand-fletched with high-profile micro vanes (Q2i Rapt-X or AAE Max Stealth) for maximum broadhead steering.
Weight-Matched Sets: Your entire dozen is grain-matched across the set to ensure tight downrange point-of-impact groupings.

Technical Specifications

Shaft Inside Diameter: .166" (Micro Diameter)
Carbon Construction: Advanced Lightweight High-Modulus Carbon with NO SPINE™ Radial Consistency
Straightness Tolerance: ±.003" (Limited Series)
Weight Tolerance: ±1.0 Grain per dozen package
Insert System: Upgraded Phantom A.R.C.O.S. Insert/Outsert System included
Nocks: Included Altra Nexum Micro Nocks
Spine Options: 250 (10.2 gpi), 300 (9.1 gpi), 340 (8.3 gpi), 400 (7.6 gpi), 500 (6.7 gpi)

Custom Build Options (Configured Above)

Select Your Spine: Matched precisely to your draw weight, draw length, and tip weight setup.
Precision Carbon Length: Clean-cut to your exact carbon-to-carbon specifications.
Front-End Weight Setup: Standard Phantom A.R.C.O.S. System or Heavy Stainless Steel Insert upgrades.
Custom Fletch & Wrap: Select wrap pattern, vane style, helical offset, and cock-vane accent color.

Want to test flight this shaft on your own setup before committing to a full dozen?

Order a single, bench-prepped sample arrow through our Test Flight Program. We will spine-index, dual-end square, wrap, and hand-fletch a single shaft to your exact specs and ship it straight to your door. Shoot it on your home range, test your broadhead flight, and use the included Store Credit Voucher directly toward your full dozen custom order!