300 rum with 4” internal Wyatt box.

[Jakeweb09]

4"

Will the kratos x work with a 3.8" box as well or is the 4" box necessary?

 

[highdrum]

Will the kratos x work with a 3.8" box as well or is the 4" box necessary?

The Kratos is cut for cfe9 box that's all that fits properly. It'd run well from the unknown munitions 3.95 dbm as well.