Original Krytac nozzle (length 21.15 mm). The nozzle from Krytac is very close, preferably do not replace it with an aftermarket variant. We have performed several tests which show that a nozzle with an o-ring vs the stock nozzle from Krytac does not give any significant FPS/Joule differences.

This nozzle can be used in most models M4 replicas.