Horton Crossbow Innovations Replacement Omni-Nock Green Cap for Crossbow Arrow Nocks, (6-Pack) (HEA-321.6G) Replacement Omni-cap for Horton arrows with receiver from 2015 Package of 6 Cap color is green NOT COMPATABLE WITH OMNI-BRITE 2.0 RECEIVERS For most Horton arrows from 2015 with green receivers installed