The 518 sight features side button functionality. It's also compatible with the drop-in Laser Battery Caps that EOTech designed to enhance aiming through the use of visible and IR lasers.

• -0 68 MOA Ring w/ 1 MOA Dot
• Dimensions: 5.6?L x 2.2?W x 2.9?H (142.3 x 55.9 x 73.7mm)
• Weight: 13.8 oz / 391.2 g
• Water Resistant: Submersible to 10 ft./3 m
• Mount: 1? Weaver or MIL-STD-1913 Rail
• Brightness: 20 settings
• Power Source: AA (Alkaline or Lithium Battery
• Battery Life: Approximately 1000 continuous hours (Lithium) or 600 hours (Alkaline) at nominal setting 12 at room temperature