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Yes, the Holosun HE507K X2 can fit a Glock 48 MOS (Modular Optic System), but it requires an adapter plate because the 48 MOS has a different footprint than the optic's mounting interface. Specifically, the 507K uses the K footprint, while the 48 MOS typically uses the RMR footprint or requires modification of the slide.

Hi Alexander and welcome. Yes, you will need a Glock MOS RMSc Plate: https://www.amazon.com/Calculated-Kinetics-Footprint-Optic-Plate/dp/B0F6VYTS8Q -------------- Cheers and stay safe!

Hi Alexander, yes sir, this will be a direct fit. The Holosun K series optics, such as the 407K and 507K, can be directly mounted on a Glock 48 MOS. This allows for a flush fit without the need for adapter plates. While the Glock 48 will accept adapter plates, the slide is already cut for RMSc optics, which accepts the Holosun K footprint. Stay safe & have a great day!