- Look through the scope at a white wall. Turn the eyepiece until the reticle appears sharp.
- Look away from the scope. Now look through the scope again.
- If the reticle is still sharp and in focus, you’re done.
- If you are not satisfied with the sharpness of the reticle, repeat the previous steps
- Turn the elevation adjustment dial all the way to the top. Do not force it.
- Now turn this same dial down, counting each click until you reach the bottom.
- Divide the number in half and click the scope back to that number. (So if you counted 100, click the scope back to 50.)
- Repeat these steps with the windage dial.
The numbers in a rifle scope’s name can be a bit intimidating, but when you know the formula, deciphering them is easy. The first two letters indicate the model, which is LB in our example. The number(s) that follow represent the magnification range. In this example, three power is the low end and nine power is the high end. Note some scopes are fixed power and will not have a range (example: LB4x32). The next number is the objective lens diameter, which is 32mm in this example. It’s important to note that this isn’t the outer diameter of the objective bell; it is only the diameter of the objective lens. Any letters that follow vary and are native to that model. Understanding how to read these dimensions will help you select the right scope for your needs and its accessories.
- Carefully remove any debris before cleaning the lenses, to prevent scratching.
- Use a soft brush to remove dirt or dust from the lenses.
- Then use a cotton-tipped swab (or the corner of a microfiber lens cloth)moistened with lens cleaner to remove any debris remaining along the edge of the lens.
- With another cotton-tipped swab and alcohol, start at the center of the lens and make a circular motion. Increase the circle size each time until you reach the edge of the lens. Multiple swabs may be needed.
- Next use a clean cotton-tipped swab (or section of microfiber cloth) with no lens cleaner to remove any remaining residue from the lens. Always use scope caps to protect the lenses from debris and scratches.
- FT model wrench A = 3mm
- FT model wrench B = 1.5mm
- MP model wrench = 2mm
If your Barra rifle scope has the illumination feature, then it uses a CR 2032 battery.