Product Description
The HE509T-FDE-GR is an enclosed reflex optical sight designed for pistol applications. Features include a Titanium housing, Holosun's Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces.
Holosun 509T X2 Reticle
FreedomGorilla Staff Review
The HE509T-FDE-GR is an enclosed reflex optical sight designed for pistol applications. 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.
Let’s start out with what an enclosed emitter optic is and how it compares the open emitter optic. Unlike the 407 or 507 k and c series, which are open reflex optics, the 509T is an enclosed optic. 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. A drop of rain or snow or lint on the emitter can cause your reticle to spatter and starburst. With no reticle, an optic is quite useless. With an enclosed optic, this is not an issue at all.
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. If you’re hard on your guns and want a bulletproof reliable red dot, it’s hard to beat these closed emitter red dots. Especially since the 509T has a titanium casing that can take a beating.
Now let's look at some of the features of this optic. Like other Holosun pistol optics the 509T has shake-awake technology, Solar FailSafe, 50k hours of battery life, and a multi reticle system.
As far as settings go, like other Holoson optics this also has the auto, manual, and lock mode. Auto Mode is the default setting and it operates with the solar cell and internal battery two-way power supply. 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.
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. In manual mode there are 12 reticle brightness levels. Level 1 and 2 are night vision compatible and obviously setting 12 is the brightness. You can increase or decrease the brightness by pressing the “+” or “-” brightness buttons. Personally I always leave mine on manual mode and about setting 6 with the 32MOA ring only. And one cool feature is the sight will remember the last saved brightness setting when powered on and off.
Next, let's cover the installation on a slide. It is different from the K and C series, but it is still not complicated to install. 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. 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. 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. Then apply forward pressure and tighten to 20 in/lbs.
A 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.
As for its dimensions the optic is 1.6x1.6x1.13. It weighs 1.72 oz. and the window size is 0.66x0.9. So let’s compare that to the 507C, which has the same footprint. The 507C is 1.78x1.15x1.15. It weighs 1.5oz. And the window size is 0.63x0.91. Overall the dimensions are pretty similar but the 507C is slightly longer. 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 closed emitter optics from Holosun are a great choice for someone who wants absolute reliability. Let us know in chat or through text if you have any additional questions!
Holosun Warranty
Holosun provides a limited lifetime warranty from the date of purchase on parts and workmanship. At Holosun’s sole discretion they will repair or replace products found to be defective under normal use without charge. They do exclude the delivery costs, which is the responsibility of the purchaser. The warranty is void if the red dot sight has been misused, modified, neglected, or disassembled prior to its return.
User Manual:
Download the 509T User Manual
Specs
| UPC |
810047071600 |
Manufacturer |
Holosun Technologies |
| Manufacturer Part # |
HE509T-FDE-GR |
Model |
509T FDE |
| Type |
Green Dot |
Power |
1X |
| Objective |
28 |
Reticle |
Multiple |
| Color |
FDE |
Description |
Red |
| MOA |
2 MOA |
|
|
FREE UPS SHIPPING FULLY INSURED 
