Give LaRue a call and tell them what you have. When I went with their LT-107, I called and was impressed with how well they knew what would fit. They said I'd have ~1/16th gap between the objective (with Butler Creek lens cover) and the rail and they were dead on. If it matters, my scope is the Nightforce NXS 5.5-22x56, so Id guess you'll need a bit more clearance with your scope's larger objective.