Boost long-range accuracy and consistency with the 20-inch, 440-grain ACU-X arrow, engineered specifically for high-performance rail-less forward draw crossbows. This premium carbon shaft utilizes a precision spine-indexing manufacturing technique to align the arrow's spine in the optimal configuration for this unique platform. By optimizing flight dynamics and structural alignment, the ACU-X ensures superior grouping and dependable results for serious hunters and target shooters.Specifications and Features: Brand: TenPoint Model: ACU-X 20 Premium Carbon Nock: ACU-X Snap-On Nock Length: 20" Weight: 440gr. (+/- 1-gr. ) (with included 100-gr. field point) Straightness: .001" Vane: 2" Blazer F.O.C: 16.5% Insert Weight: 92-gr. Brass Insert Inside Diameter: .297 Outside Diameter: .344 Crossbow Compatibility: Only for use with TenPoint Rail-Less Forward Draw Crossbows