U Style Firenock Replacement Nock (7/14/100)

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Firenock, in 2016, had a nock for almost every crossbow serving size from 0.125” to 0.165” besides 0.135.” Therefore, “U” nock was developed to fill that gap.

To fit crossbows with a 0.135" serving and arrows with a 0.300" ID with triggers / anti-dry-fire (ADF) systems that require a short-pronged design.

Available in 18 colors / shades (3 nock colors x 6 LED colors)

Full system, on average, weighs only ~31 grains

  • Ready for the only target lighted nock system that is IBO & ASA approved: Firenock “T” circuit

  • Ready for hunting and intermittent lighted nock systems that stay lit / blink for up to 21 days with a BL battery powering a Firenock “H” / “I” red circuit


  • 5
    Lights up my Ravin

    Posted by Tristan Stanley on Nov 9th 2023

    These are the absolute best lighted nocks on the market. I will never use any other brand. Literally work every single time. I tried the Ravin brand lighted nocks and returned them after having nothing but problems. You absolutely can not go wrong with these.

  • 5
    U replacemente Noks

    Posted by Alessandro Mariani on Dec 16th 2021

    excellent nock that I mount on the Zombie Slayer that I use on my Ravin. A very few nocks with the correct string attachment.