Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart

Product Discontinued by Manufacturer

Holosun LED Red Dot Sight w/Kinetic Development SIDELOK Aimpoint Micro Mount Lower 1/3 Co-Witness, Flat Dark Earth has been discontinued by Holosun and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Red Dot Sights, Red Dot Sights & Accessories yourself to try and find the perfect replacement for you!

Product Info for Holosun LED Red Dot Sight w/Kinetic Development SIDELOK Aimpoint Micro Mount Lower 1/3 Co-Witness, Flat Dark Earth

The Holosun LED Red Dot Sight w/Kinetic Development SIDELOK Aimpoint Micro Mount Lower 1/3 Co-Witness, Flat Dark Earth Color: Flat Dark Earth, Finish: Micro Arc, Fabric/Material: CNC Aluminum, Magnification: 1 x, Objective Lens Diameter: 20 mm, Reticle: 2 MOA Dot, Illumination Type: LED, Illumination Color: Red, Eye Relief: Unlimited, Adjustment Click Value: 0.5 in at 100 yds, Lens Material: Glass, Optical Coating: Multi-Layer Reflecting, Battery Type: CR2032, Battery Life: Up to 5 years, Operating Temperature: 22 - 140 Fahrenheit, Water Resistance Level: Waterproof, Water Resistant Mark: 1 m, Length: 63 mm, Width: 30 mm, Height: 58 mm, Weight: 124 g, Included Accessories: Kinetic Development Group SIDELOK Aimpoint Micro Mount Lower, Condition: New, Package Type: Box, Magnification Type: Fixed, Brightness Index: 2NV / 10DL, Quantity: 1, Tube Diameter: 22 mm, Attachment Type: Low Profile, Quick Detach, Co-Witness: 1/3 Co-Witness, W/E Travel at 100 Yds: 50 MOA. is here at OpticsPlanet with unbelievable prices ! Please also check out more options for Holosun Paralow HS403B 1x20mm 2 MOA Red Dot Sight.

Purchase your new Holosun LED Red Dot Sight w/Kinetic Development SIDELOK Aimpoint Micro Mount Lower 1/3 Co-Witness, Flat Dark Earth from OpticsPlanet today and you will appreciate the easy checkout process, fantastic customer service, Free Shipping policy and information on easily tracking your order.

Holosun HS403B-FDE-KIT1: Holosun LED Red Dot Sight w/Kinetic Development SIDELOK Aimpoint Micro Mount Lower 1/3 Co-Witness, Flat Dark Earth

Features of Holosun Paralow HS403B 1x20 mm 2 MOA Red Dot Sight:

  • Designed for day and night use
  • Advanced LED technology allows for up to 50,000 of operation
  • 2 MOA dot size
  • Parallax-free with unlimited eye relief
  • Unaffected by extreme weather conditions
  • Rugged and reliable aluminum construction
  • All lenses have multi-layer coatings
  • Improved motion-activated "Shake Awake Technology"
  • Multiple brightness settings
  • Durable PEO/MAO finish

Package Contents:

  • Holosun Paralow Red Dot Sight, 2 MOA Dot, Parallax-Free
  • Lower 1/3 Co-witness Mount
  • Low Profile Mount
  • T10 L Key
  • Rubber Cover
  • User Manual
  • CR2032 Battery
  • Lens Cloth
Compare (0)