Crossbows are getting faster every year and with that comes the need for a super stiff and heavier weight bolt.á Gold Tip has answered the call with the Laser IV.á This bolt offers all the versatility of the Laser II and III but in a heavier weight to increase kinetic energy and withstand the rigors of todays new high performance crossbows. 20 INCH, WITH FLAT NOCKS, Fletch with 4 inch vanes.