eddie from United States, VA Public Profile

I rated this product three stars because it doesn't do 1 thing that holosun says it can do. The manual mode works just fine; however, there is a problem with the auto mode. In auto mode the solar panel works just fine when there is ambient light. I actually doesn't even need much ambient light. However, when the ambient light drops the reticle almost completely disappears. It disappears to a point that it is not usable. The manual says that in auto mode under low light conditions the unit will switch to the battery and you can use the + or - to adjust the reticle brightness. I tried to adjust the reticle brightness and it still remained undetectable. I even compared it to my 509T, which i use as a backup sight on my other rifle, and when i cover both solar panels the 509T dims but it is detectable while the 515 is gone. I sent my first 515 back, thinking it might be a faulty unit but had the same problem with the replacement unit. I called holosun and explained the situation and they where completely useless. They said that the unit was behaving the way it should. I told the rep that when the unit is in auto mode that it disappears. He said that i can just push the + or - to adjust the reticle but it still remains largely unusable. I asked why do the 509T and 515 behave differently under low light. Hew said it was because one is a rifle optic while the other was a pistol optic; but, that doesn't make sense to me. When the 509T is under low light situation it s