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will this fit ruger 556 ar-15? — 1 Answer

by karl, from AZ, United States Asked on December 26, 2025

Name XS Sight Systems AR Mil-Spec CSAT Rear Sight (4.5)
$56.99 $51.24 Save 10%
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Answered by XS Sights, Manufacturer from TX, United States, on December 31, 2025

Our CSAT aperture is a direct replacement for an A2 rear aperture. If you're Ruger is equipped with a rear sight that uses a milspec A2 aperture, then yes, it will fit.

Monte @ XS

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