Don't know how Trijicon measures eye relief. On their website they quote 2.5 in. - 3.7" for a 3x9 Huron. I was concerned about it at first, but when I received my 3x9 Huron, it has plenty, not an issue. By my estimates, more like 3.25 - 3.75". It has an elongated front objective which is more of an issue than the eye relief. Kind of limits mounting options. Didn't want to go with a rail, ended up going with medium Leupold Backcountry ring mounts for my Tikka T3x Lite .270. Great set up, fantastic scope, wish I had bought a couple more when they were cheap.