I called up Ruger last month to ask about a factory threaded barrel for the SR22. They said yes they're close to releasing it by the end of this year... and to call back in another 2 months or so.
Kinda works out better for me personally since I still can't decide between the AAC Element2 and Liberty Essence.
I'm not sure if I'm an isolated problem or not, but I ordered and paid for an Element 2 on March 8 of this year and the dealer still hasn't received the can at his shop yet. So, if this is normal then you might want to go the route of Liberty since I've at least been pending on my Kodiak TL since early September (purchased the Kodiak on the same day as the Element 2)
I'm about ready to have the dealer just cancel the Element 2 order and refund me my money. To my knowledge it shouldn't have taken AAC 8 months to get an Element 2 out the doors.