Tech Support

  • Q: Are NcSTAR optics water proof, fog proof, and shock proof?
    A: All NcSTAR scopes are rigorously tested to stand up to the toughest conditions. First, all of our scopes are dry nitrogen purged expelling all oxygen making them impervious to fog and moisture build up. Next, our scopes are dunked in a 1 meter tank of water to ensure that they are properly sealed and water tight. The last phase is shock testing. Our scopes are mounted on a platform that replicates the recoil and pressure of a .50 cal. Should any of these features fail due to defect, we stand behind our products 100%.
  • Q: My scope has run out of adjustment, therefore I cannot zero it. Is it defective?
    A: Chances are, your scope is NOT defective. In many cases it is a problem with the mount set-up. Check to be sure that your mounts and rings are straight and properly tightened. Shimming the scope will likely solve the problem, as long as it is done properly. If you shim your scope improperly then internal damage may be the result. If you are unsure how to properly shim a scope then consult a trusted gunsmith.
  • Q: My compact scope will not fit on my bolt action rifle. Is there something that can be done?
    A: Compact scopes are meant to be mounted on short carbine style rifles. For example, a compact scope will not fit a long bolt action with standard bases simply because there will be not be enough mounting surface on the main tube to stretch the length of the action. An alternative would be to mount a one piece Weaver Style Base that covers the length of the action. For a bolt action rifle a full size scope will probably be more suitable.
  • Q: What do the numbers on my rifle scope represent?
    A: The numbers printed on NcSTAR scopes represent the power size and the objective size in millimeters. For example, if 4x30 is printed on your scope then the magnification of your scope is fixed at 4 power (object will appear 4 times closer than it actually is) and the objective lens size is 30 millimeters in diameter. If 3-9x42 is printed on your scope then the magnification is variable between 3-9 power (able to zoom in and out between 3 and 9 by adjusting the powering) and the objective lens size is 42 millimeters in diameter.
  • Q: I need an owner's manual for my NcSTAR product. Can I order one directly from NcSTAR?
    A: You can download a copy of the instruction manual from this site. If you cannot find the instructions for your particular item, then call our Tech Support Customer Service Center at 1-866-627-8278 or email us at, and we will send you a copy.
  • Q: How does the P4 Sniper Reticle work?
    A: Click Here for a tutorial on how to properly use the P4 Sniper Reticle.
  • Q: How does the Rangefinder Reticle work?
    A: Click Here for a tutorial on how to properly use the Rangefinder Reticle.
  • Q: How do I change the battery in my NcSTAR scope?
    A: For most NcSTAR illuminated scopes the battery housing will be located inside of the rheostat knob (the knob that controls the on/off function of the illumination). You will notice a thin cap on top of the rheostat knob. Hold the knob firmly in place and twist the top cap counter clockwise. Unscrew the cap completely to reveal the battery housing. Remove the old battery and dispose of properly. Be sure to replace it with the same battery type, not doing so may cause damage to the unit.
  • Q: How do I install my sunshade to my NcSTAR rifle scope?
    A: You will want to make sure that you are using an NcSTAR brand sunshade on an NcSTAR scope that is sunshade compatible. On the end of the objective housing you will notice a ring. Twist this ring counter clockwise to remove it. Once this ring is removed, you will see the exposed threads to which the sunshade attaches. Twist the sunshade onto the scope clockwise until it is snug, but do not over tighten. Once you have the sunshade on, install the ring in the same fashion to complete the process.
  • Q: How do I contact NcSTAR for live tech support?
    A: You can reach a Tech Support representative by calling us toll free at 1-866-627-8278, or email us at . We will be happy to assist you with questions, comments, or concerns that you may have with your product.
  • For all other inquiries please feel free to call the Returns Customer Service Center at 1-866-NcSTAR-8
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