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Johnathan, this optics ready pistol is set up for Shield footprint optics, which include (according to Optics-Info.com), which includes the various Shield optics, including the RMS and the smaller RMSc, Leupold Delta Point Pro, Swampfox Sentinel, JP Enterprises JPoint, the Sig Romeo Zero and any other sights with that pattern.
the STK is set up for Shield footprint optics, which include (according to Optics-Info.com), which includes the various Shield optics, including the RMS and the smaller RMSc, Leupold Delta Point Pro, Swampfox Sentinel, JP Enterprises JPoint, the Sig Romeo Zero and any other sights with that pattern. According to Optics-Info, the popular Holosun 507k and 407k will fit this patter with some modifications. https://www.michaelbane.tv/rock-island-9mm-racer-the-stk100/50908/
