Holosun
Titanium-housed open-emitter micro red dot on the RMR footprint with a larger window than the 507C.
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Holosun HE508T-RD-X2 Reflex Red Dot Sight, 2x 0.63 x 0.91 in, 2 MOA Dot & 32 MOA Circle, Black, HE508T-X2
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Add the Holosun 508T X2 to your build and see how it enhances your platform.