The hs403r is a small compact micro red dot optic that features holosuns new rheostat dial to adjust brightness settings.The hs403r can achieve a constant "on" battery life of up to 100,000 hours! it has a 2 moa dot size, unlimited eye relief, unlimited field of view, and has a ip67 waterproof rating.A low mount and 1/3 co-witness mount is included.

Battery: CR2032 Lithium
Magnification: 1x
Field Of View: Unlimited
Eye Relief: Unlimited
Dot Size: 2 MOA
Tube Diameter: 20mm
Length: 2.75"
Weight: 3.53 oz
Finish: Black
Reticle: 32 MOA Ring/Red Dot
Adjustment Size: .5 MOA
Proofs: Water Resistant, Shockproof
Optic Coating: Multi-Coated