This Primary Arms red dot sight is part of the SLx optics line. SLx optics built their reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. Battery Life - 50,000+ hours Battery Type - CR2032 3V Lithium Coin Brightness - 12 settings Click Value - 1/2 MOA Finish - Hard Anodized Material- Aluminum Reticle- 2 MOA Dot Reticle Color- Red Weight- 6.5 oz