This mounting adapter is designed to seamlessly integrate red dot optics onto various shotgun models, including the Mossberg 500, 535, 590, 835, and Shockwave series. It is engineered to be compatible with popular micro red dot sights such as the Holosun 407K, 407K X2, 507K, 507K X2, and EPS series, as well as other optics that follow the RMSc footprint standard. The package includes multiple sets of screws of varying lengths, pre-coated with thread locker, to ensure a secure and precise fit for different red dot models. With this adapter, shooters can easily enhance their shotgun's accuracy and target acquisition speed without any permanent modification to the firearm.