I just installed a CMP barrel on my Krag. I bought a REPO front sight from S&S firearms. The sight metal and the barrel are in the WHITE. You'll need to Rust Blue it. I did mine all together on the stove. I purchased Rust Blue from PJ's gun supplies. Paul there will talk you through the process if you call him. Then you have to install the barrel and headspace it. You need a finish reamer and some no go gages. You can rent them online. It's quite a process, but if I can do it so can you. Or find a gunsmith, GOOD LUCK there. There's a company advertising on gunbroker to do these tasks.
Email me if you have anymore questions at
Terry-Brenda@peoplepc.com
TerryR