Find it here: https://doublemdefense.com/product/dil-zilch-adapter/
Factory New.
Item Description:
Diligent Defense Co Zilch adapters. These adapt to any cherry bomb muzzle style muzzle device and adapt to hub threads while adding just 3/16" (.187") to the overall length of your can.
Item Specifications:
-Industry standard 1-3/8"x24tpi "hub" threads - also sometimes called ASR or Bravo (Fits all of our cans plus many others with the same thread)
-Machined from 6-4 titanium
-Weighs only 1.5oz (42 g)
-Features a hex on the outside of the adapter to install and remove from your suppressor.
-Standard Cherry bomb muzzle device over runs 1.5" into the blast chamber.
-Recommend 25lb/ft torque into suppressor