Super bright for superior flight visibility, the lighted ACU-X RD is equipped with TenPoint’s ACU-X Lighted Snap-On Nock with easy activation and deactivation. Upon firing the crossbow, the bow string pushes the nock fully into the bushing and activates the LED Light. To deactivate, grip the nock and pull straight out with your fingers or Bednar Perfect Puller® (sold separately) until the LED Light turns off. LED Light lasts approximately 24-hours when activated. The ACU-X RD arrow features a high-performance carbon shaft and precision spine-indexing manufacturing technique, delivering the ultimate in consistency and long-range accuracy out of rail-less reverse-draw crossbows. ACU-X RD arrows feature a 16.5% F.O.C. for improved flight, stability, and accuracy.