NcSTAR RB24 User Manual
3X MAGNIFIER & 30MM RING
MODEL # SMAG3X/RB24
INSTRUCTIONS
NcSTAR TACTICAL MAGNIFIER SERIES
1) Ocular Lens
2) Rubber Quick Focus Ring
3) Vertical Adjustment Dial & Cap
4) Horizontal Adjustment Dial & Cap
5) 30mm Ring Mount
6) Upper Ring Screws
Congratulations on the purchase of your new NCSTAR 3X Magnifier! This magnifier is equipped
with many popular features: a Prismatic Lens design that provides a super sharp and clear image, both
Vertical & Horizontal Adjustment Dials to help center the image in the magnifier, and a Rubber Quick
Focus Ring.
NcSTAR optics are backed by a Lifetime Limited Warranty, your 3X Magnifier will provide you
with years of reliable service. This Owner’s Manual will help you understand all of the features of your
new magnifier. Follow all instructions carefully before initial use to experience the best performance.
Mounting Your Magnifier
CAUTION: BE SURE THAT YOUR FIREARM IS UNLOADED AND POINTED IN A SAFE
DIRECTION. PRACTICE SAFE FIREARMS HANDLING PROCEDURES AT ALL TIMES.
Choosing a proper 30mm ring type and height is essential to successfully mounting this magnifier
behind your reflex optic. The included RB24 ring height is set for the most common optic height
(~1½”) for AR15 reflex optics.
If the magnifier and reflex optic do not align properly, there may not be enough vertical & horizontal
adjustment in the magnifier to center the reflex optic’s reticle in the magnifier. You may have to
purchase the proper ring/mount/riser to make sure that the optics are as close to the same height as
possible for proper sighting.
We recommend that you attach the magnifier to your firearm first, before placing your reflex optic
onto your firearm’s rail.
Install the 30mm ring & magnifier onto your firearm’s rail. Once you have the 30mm ring
mounted onto the firearm, it is necessary to adjust the magnifier’s position in the ring and to allow for
Maximum Eye Relief. Lightly loosen the four screws on top of the Upper Ring, until the magnifier can
be moved/ turned in the ring. Position the magnifier in the ring so that one of the Vertical & horizontal
dial is positioned on top (12 o’clock) and the other dial positioned to the right side (3 o’clock).
Next, slide the magnifier as far forward as possible in the rings. With the firearm properly
shouldered and with a normal cheek weld on the stock, look through the magnifier and move the
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