The Extender works with the Emperor/Ronin on with it. The extender is a expansion chamber to let the air expand then vent in to the suppressor to vent out at a lower pressure to reduce suppression.
Here is the installation video on the extender.
https://www.youtube.com/watch?v=6bliJPK_ZXs
Heres the link to the extender.
https://donnyfl.com/products/emperor-v3-6-5-inch-extender?_pos=2&_sid=426f850fa&_ss=r