[ARCHIVED THREAD] - CHF Barrel?

Posted: 2/4/2012 3:43:18 PM EDT

How do you determine if the barrel you are offering is CHF I am looking at this upper http://www.bravocompanyusa.com/BCM-M4-14-5-Upper-Receiver-Group-p/bcm-urg-m4-14.htm or just a barrel but i am not sure how you tell if it is CHF or not THanks for any help