Things I liked:*full metal construction
*11 brightness levels
*Integral Weaver Rail, so you don't have to take of your sights and slide it on, but
just loosen it up and put it directly on top.
*Caps to cover lens.
*Comes with battery
Things I would have changed:Red dot is kinda small and blurry, but bright. What others should know:great sight for the price.