I've heard and also discovered that the 300 blackout barrel for the sr-556 takedown is very hard to find. I had seen on another forum molon labe industries were producing these for a while but they're showing out of stick now. If anyone has any leads or information on one it would be greatly appreciated. Looking to purchase one but have a ruger hawkeye .375 stainless laminated lefthand model unfired would be willing to trade with boot obviously. Thanks in advance.