Mission® Crossbows partnered with Clean-Shot™ to design the ultimate lighted nock. These lighted nocks allow you to track the flight of your bolt in low-light conditions. They come in a package with 3 bolts already assembled with nocks. .003″ straightness tolerance. Mission® Crossbows arrows have been specifically optimized for Mission® Crossbows. They are weight matched and utilize brass inserts, 100% carbon.