EoTech 518 Holosight Black - 68 MOA Ring & 1 MOA Dot, QD Mount, Includes 2 AA Batteries

The EoTech 518 Holosight is a battle-tested holographic red dot sight built for shooters who need a fast, reliable sight picture on tactical rifles, home defense carbines, and duty weapons. The 518 delivers the proven EoTech holographic aiming system in a compact, durable package: a 68 MOA ring with a 1 MOA center dot that lets you engage targets from close quarters to extended ranges. It's the kind of sight that rewards your muscle memory and stays true when it matters.

The 518 runs on standard AA batteries—two are included—with roughly 1,000 hours of runtime on lithium cells or 600 hours on alkaline at mid-brightness. Twenty brightness settings let you dial the reticle to ambient light, and the side-button control is intuitive under stress. The sight mounts on any standard Weaver or MIL-STD-1913 rail and comes ready to shoot with a quick-detach mount, so you can swap it between platforms without losing zero. Submersible to 10 feet, it'll handle rain, dust, and the occasional dunking without complaint.

If you run IR devices or explore low-light shooting, the 518 is compatible with EoTech's optional Laser Battery Caps, which retrofit visible and IR laser aiming into the battery compartment. It's a practical upgrade path for shooters building out a night-capable rifle. Weighing just 13.8 ounces, the 518 adds minimal bulk while delivering the fast target acquisition and field of view that made holographic sights the standard on working guns.

Key Features

• 68 MOA ring with 1 MOA center dot—fast sight picture at all distances
• 20 brightness settings for low-light and daylight use
• Quick-detach mount for rapid installation and removal
• Runs on standard AA batteries (lithium or alkaline); two included
• Weaver and MIL-STD-1913 rail compatible
• Submersible to 10 feet—weather-resistant and rugged
• Lightweight at 13.8 ounces
• Compatible with optional Laser Battery Caps for IR/visible laser integration

Specifications

Reticle	68 MOA ring, 1 MOA dot
Mount Type	Weaver / MIL-STD-1913 (1" rail); quick-detach included
Brightness Settings	20 levels
Power Source	AA battery (alkaline or lithium)
Battery Life	~1,000 hours (lithium) / ~600 hours (alkaline) at nominal setting
Water Resistance	Submersible to 10 feet (3 m)
Dimensions	5.6" L × 2.2" W × 2.9" H (142.3 × 55.9 × 73.7 mm)
Weight	13.8 oz (391.2 g)
Color	Black
Included	2 AA batteries

Frequently Asked Questions

Will the EoTech 518 mount on my AR-15 or rifle?

Yes. The 518 mounts on any Weaver or MIL-STD-1913 picatinny rail—that includes most modern AR platforms, tactical rifles, and duty carbines. A quick-detach mount is included, so you can take it on and off without tools.

How long do the batteries last?

At nominal brightness setting, you'll get approximately 1,000 hours on a lithium AA battery or 600 hours on alkaline. Two batteries come in the box, and standard AA cells are easy to source anywhere.

Is the 518 waterproof for hunting or wet conditions?

The 518 is submersible to 10 feet, so it'll handle rain, river crossings, and typical hunting and tactical conditions without issue. It's not meant for extended submersion, but weather-resistance is solid.

Can I add a laser to the 518?

Yes, EoTech makes optional Laser Battery Caps designed to fit the 518's battery compartment, allowing you to integrate visible and IR laser aiming for low-light or night operations.