Getting ready to E-file my form 1 for a can that will be used on my 6.5 and several .223s. My question is direct thread (bushing, rockset or similar almost permanent attachment, on the 223s to go from 1/2" to 5/8) or muzzle devices with the same attachment type on all? What are the pros and cons of each and if you think muzzle device is the way to go, which one? Also, kinda set on a form 1 built from a reputable kit as I have lathe and lathe operator access and I don't want to wait a year + for a factory can.