Not available for US customers. If you place an order containing any Holosun items to be shipped to the US, it will be cancelled and a 5% cancellation fee applied. The HS515GM is a micro red dot optic equipped with a 65 MOA circle dot reticle with the option of switching to a 2MOA dot only. The “G” signifies that the battery is side mounted on the side of the optic. Employing new LED technology, the life-time for one CR2032 battery can reach 5 years on the 2 MOA dot. Holosun’s “Shake Awake” technology automatically turns the optic on at the slightest movement. When the optic senses no movement, it will go to sleep. This product includes clear flip-up lens covers, a quick release mount and a kill flash filter. • Parallax free with unlimited eye relief.• New advanced technology LED allows up to 50,000 hours of operation on one CR2032 battery• 2 MOA dot and a 65 MOA ring• Parallax-free with unlimited eye relief• Includes Flip-up lens covers and Kill Flash• Quick Detach 2 piece mount included OPTICAL DATA Light Source LED Reticle 2MOA Dot & 65MOA Ring Parallax Free Yes Unlimited Eye Relief Yes Magnification 1x Multi-Coatings Yes Integrated Laser No ELECTRONIC DATABattery Type CR2032 Battery Life Up to 50,000 Hours Brightness Setting 10 Daylight & 2 NV Compatible MECHANICAL DATAHousing Material 7075 Aluminum Surface Finish Hard Anodized Housing Color Black Adjustment per Click 0.5 MOA W&E Travel Range ±50 MOA Storage Temperature -58℉ - 158℉ Working Temperature -40℉ - 140℉ Submersion IPX8 Vibration Up to 1000G PHYSICAL DATAWindow Size 20mm Diameter Dimension (in) 2.44 x 1.77 x 1.37 Weight (oz) 7 Central Height (in) 1.63