Make Your Standard M&P Series Pistol Red Dot Ready with the Leupold DeltaPoint Micro Leupold has been pushing the boundaries with their red dot selection to ensure that the shooter gets the best performance from their optics. At first their red dot required a special mount set up now with the DeltaPoint Micro all you need is the existing dovetail cut for the rear sight on the slide. This nifty little optic is meant to replace the rear sight it has a 3MOA red dot reticle and a simple push bush button interface. The sight has 8 illumination settings and if the optic does run out of battery it can be used like a ghost ring sight in a pinch. The red dot is also enclosed against the elements bringing that same Leupold dependability to a pistol optic. In all this optic share the Leupold vision of dependable user friendly optics. Leupold DeltaPoint Micro for Smith& Wesson Pistols Specifications and Features: Item Number 179570 Red Dot Sight 3 MOA Dot Push Button Switch Unlimited Eye Relief Mounts into Existing Rear Sight Dove Tail Microfriction Windage and Elevation Adjustments Motion Sensor Technology 8 Illumination Settings Runs on CR1632 Battery Has up to 30,000 hour battery life Waterproof, Fogproof and Shockproof Design Length: 2.25" Eye piece Diameter .35" Weight 1.1oz Matte Black Finish Fits: Smith&Wesson M&P series Pistols Does Not Fit: Smith&Wesson M&P CORE, and Smith and Wesson Shield EZ models