Threading a barrel for future use of a silencer?

[XC700116]

1/2"-28 is the standard thread for a 5.56/.223.

And yeah you don't need a die, take it to a GOOD gunsmith, one that actually builds guns, not just assembles parts, and pay them to do it. Unless of course you are a qualified machinist and can get the threads concentric to the bore using a lathe. Although I'm assuming you are not since you're looking to buy a die for it.

It's not as big of a deal for a flash suppressor, but when it comes to a regular suppressor you don't want to end up ruining your $1000 investment the first time you pull the trigger because of a baffle strike due to a shoddy threading job.