Finally got one of my 223 barrels cut for my Otter Creek Labs OCM5. I wanted to minimize the added OAL when the suppressor was added so I wanted more barrel past the threads where there would normally be a brake or flash hider. I brought the idea to Ryan Beck with Base Camp Guns in Martinsburg, PA and he created a program for his CNC. With the mount cut into the barrel the suppressor only adds 5" to the overall length. Ryan did an awesome job with the machining and their cerakoter Dave(I think is his name) did and awesome job too. I'm really happy with how it turned out. Almost looks like a 16.5" 223 version of the XM3.