Pick your components, watch the arrow come together, and get the numbers that matter — total weight, FOC, kinetic energy and a spine match — live. Save or share your build. Runs in your browser.
FOC here is estimated from component weights and typical positions — good for comparing builds; a finished arrow measured on a balance point is exact. Spine match uses the same chart as our Spine Selector. These numbers are a starting point — always paper-tune.