The FXII 4x is a short tube scope. It will fit your Remington, but it will only fit between the rings with no extra fore/aft adjustment. If that is the right eye relief for you, then you're good to go. If not, then you've got to play with different ring setups.
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I ended up ordering a Leupold FX-11 4 x 33. The 4 x33 has a 5.5" (137.9mm) tube which is 1/2 inch (12.9mm) longer than the outside spacing on my rings. That gives me 1/2 inch to play with either way which hopefully allows me to set-up the scope for correct eye relief, or at least very close to it.
