With the variety of optics on the market nowadays and different eye reliefs, getting that perfect eye relief on some optics can be very difficult. You may need to move the front scope ring back to achieve the eye relief to get a consistent check weld. The Warne Maxima front base steel extension base may help you get there. Determine how far back you need to move it to see if the .554" base extension will solve your problem. We also make a .854" extension if you require more space. Check the list below under "fits" to see all the rifles that can help you achieve your desired eye relief.To be used with Warne Maxima Remington 700 rear base.