Talked with Shaw again today, and it looks like the unthreaded target-crown muzzles are a go. These will be very limited in number, but they will be available. I'm hoping for delivery of the barrels by early March. Pricing as follows:
18" 5/8-24 muzzle thread: $175
20" 5/8-24 muzzle thread: $185
18" target crown: $185
20" target crown: $195
Once I get the barrels, I need to put three uppers together so that I can test them. After they pass my initial testing they will be available for purchase.
Also, I'm looking into having M&R Arms Diamond Kote some of the barrels. I'll wait and see how I like the first couple samples that I get back from them.