Firenock is the most advanced lighted nock system on the present market. Firenock is employing Missile Arming Technology and Surface-Mount Technology (SMT) which means Firenocks do not require any actuator / pushing / twisting to turn on or off. Firenock lights itself up once it is fired / shot (i.e. by G-force = change in speed, Missile Arming Technology). Firenocks will stay lit after hitting hard objects (bone, stone, concrete), if the game is moving vigorously, and even if submerged into water for weeks.
Firenock nock style selector tool:
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