The Theta Optics RIS Open Reflex Sight Replica is an open reflex sight built for fast target acquisition, a wide sight picture, and easy mounting on standard 22 mm rails. It features a metal body, a 90 mm overall length, a black finish, and selectable red or green dot options. Three integrated RIS rails are also built into the optic body for compact accessories, while vertical and horizontal adjustments help you zero the sight precisely. Power comes from a CR1620 battery.

Technical details

• Material: metal.
• Length: 90 mm.
• Weight listed on the page: 170 g; another section of the page shows a product weight of 280 g. For commercial consistency, the 170 g value shown in the technical summary is the safer one to use.
• Color: black.
• Dot color: red and green.
• Mount: RIS 22 mm.
• Adjustment: horizontal and vertical.
• Power supply: 1 CR1620 battery.
• Available aimpoints: four.
• Integrated body rails: three.
• Product code: THO 10 009073.
• Retail warranty: 24 months.

Package contents

• Reflex sight.
• Hex keys.
• User manual.
• Cleaning cloth.
• CR1620 battery included.

How to use

• Mount the optic on a properly tightened 22 mm RIS rail.
• Install the CR1620 battery with correct polarity.
• Select the dot color based on ambient light and personal preference.
• Adjust windage and elevation until zeroed.
• Use the integrated accessory rails only with lightweight compatible accessories so the setup stays balanced.
• After use, switch the unit off and store it in a dry place.

Safety warnings

• Do not use the product as personal protective equipment.
• Do not tamper with the electronics or housing.
• Periodically check mount tightness.
• Keep out of reach of children.
• Avoid impacts, drops, and improper use.
• Remove the battery during long storage periods.
• Store away from moisture and heat sources.