Theta Optics RIS Open Reflex Sight

Theta Optics
Code: THO-10-009073
  • 3 x RIS Rails
  • Multiple Reticules
  • Large Sight Picture

This rather large Red Dot Sight from Theta Optics offers a large sight picture for easy target acquisition, multiple choices of reticule, integrated rail mount and 3 x short 20mm RIS sections for the connection of extra accessories.

Full description


The Theta Optics RIS Open Reflex Sight is the ideal choice for mounting on any Assault Rifle, and offers a large Sight Picture, meaning more of the battlefield will be in your vision and you can be quicker to react. The sight has a dial that lets you select the type of Reticule you want, from a simple Target Dot to Plus and Circle configurations. The brightness of the dot can be set by turning the illumination dial, offering you a choice of Red or Green with variable brightness. This is also where the included CR1620 Battery is to be installed. The sight comes out of the box with an integrated 20mm Mount, meaning it will install to any standard 20mm RIS/RAS Picatinny Rail. The 'sun shade' portion of the sight has side and top 20mm rails, allowing you to create a wide range of ridiculous combinations using Lasers, Torches or EVEN MORE SIGHTS! Do it for the memes...


  • Large Red Dot Sight
  • 3 x RIS/RAS Rails
  • Integrated 20mm Mount
  • Multiple Reticules
  • Red/Green Reticule
  • Variable Brightness
  • CR1620 Powered
  • Battery Included
  • Allen Key Adjustments
  • Silver Mirrored Obj. Lens
  • Alloy Construction

Package Includes

  • Theta Optics RIS Open Reflex Sight
  • CR1620 Battery
  • Cleaning Cloth
  • User Manual
  • Allen Keys



Parts & Accessories Type
Sights and Scopes
Sight Type Icon
Sight Type
Red Dot Sight
Package Includes
Instruction Manual, Battery, Cleaning Cloth, Allen Keys,

Weight and Dimension

Product Height
Approx. 6cm
Product Length
Approx. 8cm
Weight KG Icon
Weight (KG)
Approx. 0.165kg


Colour Wheel Greyscale
Item Colour
Construction Icon

Sight Specific

Sight Magnification
Sight Adjustment Adjustments
Windage, Elevation, Illumination,
Sight Zero Adjuster Method
Hex / Allen Key
Sight Zero Location
Top, Left,
Sight Mount Options
Integrated Rail Mount
Reticle Type
Target Dot

Illuminated Sight Specific

Illuminated Reticle
Illuminated Reticle Colours
Red, Green,
Battery Type