Firenock “F” was designed originally in 2007 for those who own a TenPoint or Excalibur and want a reliable lighted nock. Due to how crossbow owners at the time were using arrows with different IDs, we developed a dual O-ring system* to make up for that (i.e. for smaller shafts, smaller O-rings and vice versa). Additionally, as of 2012, to compensate for faster crossbows that need better contact, the head of the nock is micro-textured.
To fit most crossbow shafts with a 0.298" - 0.303” ID**.
*O-rings not included. Available at purchase (OC pack).
**For the 2216 with a 0.306” ID, an extra large set of O-rings can be selected at purchase.
Available in 18 colors / shades (3 nock colors x 6 LED colors)
Full system, weighs ~29 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