Are you planning to shoot matches or are you just piddling?

If you go the .556/.223 Wylde route, order the White Oak Service Rifle barrel and be done with it.

https://www.whiteoakarmament.com/sh...ustom-post-ban-service-rifle-barrel.html

Add a float tube with a match trigger and you are GTG.

If you plan to shoot sitting or prone and sling up, you'll need to order the White Oak Service Rifle Railed Gas Block, .750"

https://www.whiteoakarmament.com/picatinny-750-clamp-on-gas-block-for-service-rifle.html

It has the cut out for the front sling swivel on the float tube.

You'll need to stick with the 75, 77 or 80 gn. projectiles.

Accuracy with the White Oak barrel will generally start to fall off around 2500 rounds.