Easton 4mm Full Metal Jacket Shafts are precision-made arrow shafts featuring a carbon core wrapped in a 7075 aluminum jacket, built for archers who demand durability and consistent flight. Sold as a 12-pack and available in multiple spine options to suit different bows and setups.

• Diameter and Construction: 4mm micro-diameter carbon core with a rugged 7075 alloy jacket for a lightweight but tough shaft.
• Material and Craftsmanship: Carbon core paired with a 7075 aluminum jacket provides balance between stiffness and durability to withstand routine practice and field use.
• Straightness: Precision-ground straightness within +/-.003 inches for stable flight and predictable impact points.
• Origin: Made in the USA under strict quality control standards.
• Spine Options: Available in 250, 300, 340, and 400 spine to match various bow setups and draw weights.
• Pack Size: 12 shafts per pack (1 dozen) for easy stocking and replacement after practice sessions.

The Full Metal Jacket design protects the carbon core from nicks and dents, helping shafts last longer in both transport and impact scenarios. The slim 4mm diameter can contribute to a cleaner, more stable flight path, while the tight straightness tolerance reduces vertical shift across shots. With its USA-made build and versatile spine options, these FMJ shafts are a practical choice for serious target shooters, 3D archers, and hunters who want consistent performance from their arrows.