The ACU-X 20 is a 20-inch, 440-grain crossbow arrow built with a high-performance carbon shaft and a precision spine-indexing process for consistent long-range accuracy in rail-less forward-draw crossbows. It uses a Snap-On nock that provides an audible click when engaged and is designed to reduce lateral nock travel while helping preserve center serving life. Each arrow is fletched with 2-inch Blazer vanes and includes a 92-grain insert, delivering a 16.5 percent FOC. Arrows are inspected to 0.001-inch straightness and weight matched within 1 grain per arrow.