The 509T incorporates all of Holosun's best features with shake awake technology, a solar failsafe, multiple reticle system, and red reticle color. The tactical sight is lightweight and draws the ...

The FN Reflex looks like an FN 509, but is a palm-sized version ... The MRD has a slide cut for Shield RMSc and Holosun K-series. I tested the MRD model, but did not add an optic for this test.