Selling a brand new Rosco barrel. Decided to go with 12.3" instead. Full specs and details are in the below link.
https://www.roscomanufacturing.com/...rrels/bloodline-14-5-mid-length-m4-5-56-nato/
https://www.roscomanufacturing.com/...rrels/bloodline-14-5-mid-length-m4-5-56-nato/