F (C/D/D2/D3/J/M/Q/U/V) Style Extreme Shock End Cap

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XF Firenock Extreme Shock End Cap packs are custom accessory or replacement packs for 10 styles of Firenocks; C/D/D2/D3/F/J/M/Q/U/V Style lighted nocks.  With installation of extreme shock end cap, your Firenock lighted nock will be able to shoot into hard object: cinder block, rock and most dried out hard wood without being destroyed and your Firenock will stay "Bright Lit".
    Standard Packge :
  • 3 extreme shock end caps with O-rings
  • 1 installation tool

    Bulk Package:

  • 100 extreme shock end caps with O-rings
  • Gel type super glue (e.g. Firenock AGOGEL, sold separately) is needed to successfully install Extreme Shock End Cap.
  • Clean arrow shaft with acetone before installation of End Cap.
  • Put glue into your cleaned arrow shaft (do not put glue on End Cap / Tool).
  • Insert End Cap with tool straight (rotate slightly may need) into the arrow shaft.


  • 3
    Threading battery end cap onto tool

    Posted by Buck Kline on May 7th 2023

    The machining of the threads is rough probably because of cutting the vent slot. This creates uncertainty on how far cap should be threaded onto tool. It would be good if there was a definite "stop" when threading cap on. This would remove uncertainty. Or possibly engineer a design that includes the end cap onto circuit frame

  • 5
    Extreme Shock battery end cap

    Posted by D on Apr 27th 2023

    I will tell anyone who asks, there is a bit of a learning curve with any of the Firenock products, but they are well worth the it. You will not find any better. Why spend a bunch on your crossbow and arrows then add inferior products to them.