The DHD Nub/Chop Top Tip Adapter for the Recoil Rebel is a black Delrin adapter that replaces the stock top cap on the "Snake Bite" barrel (does not work on the AFC barrel).

This is the adapter only. Nub and Chop Top tips are sold separately.

Instructions:

You must take your existing o-ring off of the Rebel snake bite cap and put it on this adapter for the adapter to fit.