Overall the closed emitter optics from Holosun are a great choice for someone who wants absolute reliability. I would have thought that the 509T would have been a bit more heavier since it is titanium instead of aluminum and has a second lens, so that’s cool to see. Overall the dimensions are pretty similar but the 507C is slightly longer. So let’s compare that to the 507C, which has the same footprint. Then apply forward pressure and tighten to 20 in/lbs.Ī side note here - while looking at the 509T I was wondering if the clamp would fit onto a picatinny rail, and it does not but I did see an adapter that would work for that.Īs for its dimensions the optic is 1.6x1.6x1.13. Then using the included T10 Torx tool, loosen the clamp screws and attach the 509T onto the plate so the recoil lug engages the slot on the plate. To install the 509T, first you have to attach the mounting plate to the slide using the two included 6-32 T10 flat head screws and tighten the screws to 15 in/lbs. The 509T comes included with a RMR adapter plate, which is the same footprint as the 407/507C, and Holosun also sells a MOS adapter for the 509T. It is different from the K and C series, but it is still not complicated to install. ![]() Next, let's cover the installation on a slide. And one cool feature is the sight will remember the last saved brightness setting when powered on and off. Personally I always leave mine on manual mode and about setting 6 with the 32MOA ring only. You can increase or decrease the brightness by pressing the “+” or “-” brightness buttons. Level 1 and 2 are night vision compatible and obviously setting 12 is the brightness. In manual mode there are 12 reticle brightness levels. You can switch to manual mode from auto mode by holding the “+” brightness button for about 3 seconds, you’ll know it’s on manual mode when the reticle blinks once. Essentially based on your ambient lighting level, the sight will auto adjust the brightness of the dot and also switch between battery and solar cell power if the solar cell cannot drive the reticle alone. Auto Mode is the default setting and it operates with the solar cell and internal battery two-way power supply. Like other Holosun pistol optics the 509T has shake-awake technology, Solar FailSafe, 50k hours of battery life, and a multi reticle system.Īs far as settings go, like other Holoson optics this also has the auto, manual, and lock mode. Now let's look at some of the features of this optic. Especially since the 509T has a titanium casing that can take a beating. If you’re hard on your guns and want a bulletproof reliable red dot, it’s hard to beat these closed emitter red dots. So when deciding if you want an open or enclosed emitter, in my opinion I’d think about how durable you want the optic to be and how much you want to spend. With an enclosed optic, this is not an issue at all. With no reticle, an optic is quite useless. A drop of rain or snow or lint on the emitter can cause your reticle to spatter and starburst. Enclosed optics feature an enclosed emitter that utilizes a hood-like system and an additional lens to protect the emitter and ensure nothing can come between your lens and the emitter. Unlike the 407 or 507 k and c series, which are open reflex optics, the 509T is an enclosed optic. Let’s start out with what an enclosed emitter optic is and how it compares the open emitter optic. Its features include a Titanium housing, Holosun’s Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake technology. The HE509T-FDE-RD is an enclosed reflex optical sight designed for pistol applications. The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces. Features include a Titanium housing, Holosun's Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. Multi-Reticle System (MRS): 32 MOA Circle & 2 MOA Dot.Auto mode now runs in the background and offers solar power when there is no battery or dead battery.Addition of Lock Mode: Lock mode locks out the buttons until a deliberate long press unlocks them.Improved programming that enhances usability. ![]()
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