Griffin cans don't have thread reliefs on them. Maybe he does now, I am not sure.
This is the Remington threading:
Griffin discusses it here (you can post this on AR15 if you wish):
http://www.silencerresearch.com/Foru...pic.php?t=1939
Griffin says:
"Opting for an .093"-.125" or so thread relief may be compatible with more suppressors/muzzle devices on the market. In my opinion more compatibility is a good idea."
Macman wrote:
"Did not think a relief was needed when I threaded two of my rifles last month,as both of the suppressors have a thread relief."
Tornado Technologies, an awesome barrel threading company, said:
"Unless the customer requests it, or we see some reason why not to do it, all .308's we now thread are done the same way as the Remington rifle.
Every major manufacturer that I've seen out there has a relief in their can."
I am not sure why Green0 is saying that AAC's position is that as long as it fits their can, then it is ok. That is not my position. I can take a barrel with or without its own thread relief, but a can certainly should have one. Green0 (Griffin) says Remington should make the barrel compatible with as many cans as possible, but yet he does not make his can compatible with as many barrels as possible.
So why did I not put a thread relief there? I wanted to leave as much material as possible for rigidity. Was that the only way to do it? No, but it was done by design.
Threaded Mode