Do you have to use the deep six inserts for the Easton 5mm FMJ? Or can you just put in regular inserts?
This depends on what type of broadhead you're shooting. If the blades are held in place by being pressed between the arrow shaft or insert and some sort of collar or ring on the broadhead then yes, you need them. However if you're shooting any type of mechanical broadhead or broadhead whose blades are held in with screws or other mechanism then the BAR is not necessary.