This sight is smaller than the former n-cell batter sight (511/551), and it is waterproof to 10 meters.It runs on a single cr123a battery, and it has a longer battery life than the n-cell style sights.With the single battery configuration, the xps allows more rail space than ever, leaving more room for rear iron sights or nv mount.Smaller, lighter and always fast; the xps series is a great addition.This holographic weapon sight is night vision compatible with up to 10 settings for nv use.

Battery: CR123A 3V
Magnification: 1x
Objective: 30x23mm
Field Of View: 30 yds @ 4" Eye Relief
Eye Relief: Unlimited
Dot Size: 1 MOA
Length: 3.80"
Weight: 9 oz
Finish: Matte Black
Reticle: Red Ring/Dot
Adjustment Size: .50 MOA
Proofs: Fog/Waterproof
Optic Coating: Anti-Reflection
Windage Elevation: Adjustable