Front face of sight has diamond tread pattern for racking slide. The dot is super bright! There have been some mentions of refresh rate. You get a sturdy well built optic with a company that stands by their product like no other.

Top load battery is amazing! The included tool is nice. Window and strength like a rmr looks good and functions great. I like everything about it except it's shut off feature realistically if you carry this on an edc it's probably never going to shut ...  Read More

Vortex is very good about customer satisfaction so if it breaks, they will for sure replace. Best budget option out there for the money. Recommend for ccw.

The lock button is also the brightness up button and sticks outside the frame. The battery life is way way below the average for similar models. The laser itself has too many lines and has a big red outline making the laser have a starburst look.

Holosun 510 is far superior to the cheapo red dot clones. Wide view, great adjustable reticle. X magnifier it is great.

Holosun has very a strict warranty, don't end up with a 300 dollar paperweight like i did. I find this to be completely unacceptable and have already started my return. Its a paperweight at best.

Light coming from where it projects the reticle onto the lens is distracting. Battery life is terrible and the brightness is not that good.

Holosun sights are great sights, but the experience with this seller was horrible. No quality control sticker like reputable manufacturees have from the last one to check it prior to shipping. Beware on fake holosun products.

One unit failed to power on despite a battery swap, the other has a recurring reticle surge from dim to bright. That's just unacceptable for a $340 optic. Buy vortex or eotech instead.