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Our line of folding sights is second to none. These sights are specifically designed to work on all SIG Sauer 522 & 556 variants. Trusted by great companies like SIG Sauer & Ruger, our folding sights set the industry standard for function and reliability. Our backup iron sights (BUIS) are available in manual deploy and quick-flip spring deploy for shooters that need a plan B at the flip of the wrist or push of a button. Also available in HK and A2 front sight halos, same plane and dual aperture rears as singles or sight packages.