Ben Hart Shoots goes over the Holosun 509T enclosed emitter red dot sight. He discusses its titanium construction, Multi-Reticle System, and impressive durability, highlighting its resistance to drops and its IP67 water rating. Other key features he also noted are the Shake Awake and Solar Failsafe, though the auto-brightness function is deemed impractical. The 509T's compact size and light weight are emphasized, along with its advantages over open emitter optics due to better protection from debris and moisture. In the end, he highly recommends the 509T as an "awesome pistol optic" offering great value and features.