Disco aftermarket barrel?

I am not aware of anyone offering a drop in disco barrel. However, you could pick the blank of your choice and have someone machine it for a disco. Roy at Mountain Air Customs and Jim Gaska do really good barrel work. I am sure there are others that can machine a barrel for you, but I have bought drop in barrels from both Jim and Roy and I can attest to their work.

Machining barrels for the Marauder and Discovery/Maximus is the reason I will be adding a new mill to my shop in the near future.