Holosun Reflex Red Dot Sight 1x 0.58x0.77in 6 MOA Dot Black. The HS407K X2 improves on the previous version by adding Lock Mode which was first introduced in our 2018 LEM pistol optic models. Lock Mode when activated locks the buttons preventing inadvertent setting changes. Additional features include Holosuns Red Super LED with up to 50k hour battery life a crisp 6MOA dot and Shake Awake. The durable housing is made from 7075 Aluminum uses Holosuns K footprint and houses the 1632 battery in a side-mounted tray for easy replacement when needed. The HS407K X2 is a direct for P365X/XL and requires an adapter plate for slides with a four-boss interface. Specifications for Holosun HE407K-GD-X2 1x 0.58x0.77in Reflex Red Dot Sight: Manufacturer: Holosun Color: Black Finish: Anodized Fabric/Material: 7075-T6 Aluminum Magnification: 1 x Objective Window Size: 0.58x0.77 in Reticle: 6 MOA Dot Illumination Type: LED Illumination Color: Gold Brightness Settings: 12 Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Open Parallax: Parallax Free Lens Material: Glass Battery Life: 50000 hours Operating Temperature: -30 - 60 Celsius Water Resistance Level: IP67 Gun Make: SIG Sauer Gun Model: SIG Sauer P365X SIG Sauer P365 XL Length: 1.6 in Width: 0.98 in Height: 0.95 in Weight: 1 oz Red Dot Sights-Footprint: Holosun K Package Contents: Holosun HE407K-GD-X2 1x 0.58x0.77in Reflex Red Dot Sight Multi Tool Lens Cloth Holosun HE407K-GD-X2: HE407K-GD-X2 Reflex Red Dot Sight 1x 0.58x0.77in 6 MOA Dot