Qualty product that needs protection - Holosun HE507K-GR X2 1x Green Dot Reflex Sight

Mounted this on a Shield M&P 9mm edc; love the choice of reticles, and the green color picks up fast. A short learning curve on the operation. If your eyes are aging or have astigmatism, this will eliminate the sight radius focusing btwn front & rear sight. I'm not a great pistol shooter, but the improved accuracy was very obvious. Also, if you have a pop-up loaded barrel indicator,it might need to be replaced with a flush top as it can be annoying. Carry a lens pen and cleaning wipes for the glass as it can dirty very easily from gunsmoke and dust. Sorry Holosun but I took off a star from this beautiful but pricey quality optic. For the price you could included a dust cover; even my cheapie came with one. Regardless, it has been worth the investment and would recommend.