The intense 951 XC is basically the intense Sniper Trail but in a lower-spec version. So what is the 951 series? Well basically as near I can tell it's an intense entry-level line that is sold thru Costco.com and their website. They seem to essentially be a rebranded intense sniper trail and an intense primer 29. Like I said you can order them direct or costco.com . However, what is even better is that you can pick up the returns from Costco at a nice little discount on the intense 951 site.