CBI is Criterion Barrels. Here is a link to the Northland Shooting Supply (NSS) page here on CBI barrels. Best way to find out about CBI's is to call NSS and talk with Jim Briggs. He is a great guy to talk to and full of knowledge. He can tell you all about them and keeps quite a few on the shelf.

http://www.savageshooters.com/showth...-Rifle-Barrels