The EoTech 551 is a holographic daytime weapon sight that is night vision compatible. Fast and surgically precise sight acquisition is possible, without compromising your 'heads-up' peripheral vision.
The versatility of this sight is remarkable, as it can be used in conjunction with a night vision monocular. This combo effectively produces an accurate and versatile night vision riflescope. A special night vision setting allows the operator to immediately drop the brightness intensity of the holographic reticle to eliminate any "halo" effect and saturation of the night vision device. When the appropriate rail extension and quick release mechanisms are employed, this combination allows your weapon to go from broad daylight to no-light environments quickly, easily, and without losing zero.
This is an extremely durable and reliable weapon sight. It is waterproof (submersible to over 30') and fogproof, with a repeatable 1 MOA after remounting. The window material is a 3/16" thick shatterproof laminate with anti-glare and scratch resistant coatings, and the housing features a non-reflective black hard coat finish. This sight features a shorter housing than the 552, and runs on N type batteries.
Engineered for small to medium caliber weapon platforms, the 551 is an excellent choice for use in CQC or urban battle environments. Because it is also accurate for longer range sighting, it should be noted that the holographic technology leaves no muzzle-side optical signature. Whatever your tactical needs are, you can rely on the EoTech 551.