Sirius Archery Gemini Arrow Shafts Report

Product Overview

The Sirius Archery Gemini .204 Precision Carbon Arrows are custom-built with a woven outer jacket for enhanced strength, straightness, and spine consistency. These shafts are available in multiple spine options (150, 200, 250, 300, 350, 400).

Customization Options

1. Straightness Tolerance: .003–.005 or .001 Pro grade.
2. Inserts & Components: Options include Half Jacket AL/SS or SS/SS (75–100 gr, 150–200 gr) and Aluminum Outsert System (85–115 gr). Insert choice affects arrow weight and HuntPro warranty eligibility.
3. Build Tiers:
– EasyBuild: Limited vane choices, full length inserts.
– ProBuild: Full range of vane options, spine alignment, squaring, and component installation.

Performance & Specifications

The Gemini shafts are lightweight with lower grains per inch (GPI) compared to other Sirius models. For example, a 300-spine Gemini is approximately 8.65 GPI. This allows for faster arrow speed and potentially higher Front of Center (FOC) percentages, improving penetration.
Sirius employs precise carbon layering and maintains tight tolerance control, achieving sub-0.002″ runout — far better than standard big-box arrows with 0.010–0.015″ tolerance.

Measured Data of the Gemini Arrow Shafts

Our Build Using Software for Archers Xpert

Summary of the Gemini Arrow Series by Sirius Archery

The Gemini arrow shafts delivered as expected. With a lighter grains-per-inch (GPI) compared to most competing shafts and the incorporation of the Half Jacket system, we achieved an overall arrow build with approximately 18% Front of Center (FOC). This elevated FOC contributes significantly to enhanced flight stability and may indeed improve penetration upon impact. The Gemini shafts are an excellent choice for archers seeking lightweight, high-performance arrows that maintain excellent consistency and build quality. For best results, opt for the ProBuild option to ensure full customization and enhanced durability. Be mindful of shipping and consider requesting additional packaging protection. For more information, visit siriusourdoorgroup.com.