I put a Holosun 508T on my tactical shotgun and absolutely love it. I know it's not a DG rifle, however that hasn't stopped hundreds of police agencies from switching from Trijicon to Holosun. Optics mounted on pistols that see thousands of rounds a year with as much if not more abuse than a DG rifle can dish out. Here are the reasons I chose Holosun over Trijicon.
First is the battery...specifically what it takes to change it. The Holosun opitcs I was looking at (maybe all of them, but I didn't check) have a battery compartment tray that is accessible without having to remove the optic from the mount. This is not the case with Trijicon, which requires removing the optic from the mount, changing the battery, reinstalling & torquing the screws. Now it needs to be re-zeroed. Many law enforcement agencies do not allow the individual officers to perform this task, instead handing it off to the armorer. With the Holosun it's a simple operation that anyone can do and doesn't require a re-zero of the firearm.
Second - Durability. I'm not in the military (although I served in the Navy) and do not require the same equipment that our fighting forces do. That said, I'm not exactly easy on gear. Hunting can be rough sometimes, and so can a home defense situation. After much deliberation and research, it was my decision that the Holosun offered a level of durability that I'm not likely to surpass. Drop test, water rating, recoil testing on pistols, shotguns and rifles...the results were impressive.
Third - Reticle options. Trijicon offers dots of varying sizes on each model, but there is only one dot available on each model. The user is not able to change the dot size or add a ring. Not the case with Holosun. Depending on the optic you choose, on the same model the user can change from a dot to a dot-circle to just a circle. Some models offer up to three different circle sizes depending on what you would like for any given situation. The HS507COMP has this feature, it's pretty neat.
Fourth - Shake awake technology. It's simple. If the firearm (with the optic installed) is moved, the optic turns on. In addition to this, the model I chose has a sensor to detect the ambient light and automatically adjust the brightness setting. So in a low light condition the reticle is more dim, and when it's in direct sunlight it's all the way on high...all done automatically. This feature can also be turn off so it can run in manual mode.
Price or value, however you would like to put this. I chose Holosun for what was in the package and would have been happy to pay more than the cost of an RMR to get it. The fact is that it was several hundred dollars cheaper than the Trijicon I was looking at. It made the decision all that much easier.
Shamless pic of the optic mounted on the shotgun...
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