Firenocks - much easier to recover shot arrows 

Firenocks, Illuminated nocks - Work great.
Firenocks take a little more care/detail when installing them - but work really great once you have them in.
The Gluing process using SuperGlue that comes with the Nocks takes a little effort and patience - does not happen in 15 min.... but follow the instructions and let the curing glue sit over night (or longer if you can) to ensure the glue for the Extreme Stop is fully cured before you install the nock with the battery.
Good luck hunting!
Eric/G6Wings