The UTG OP3 Micro Red Dot (brand part no. OP-RDM20CTS) is a compact red dot sight built around a 4.0 MOA dot, sized for shooters who want a fast, precise aiming reference without the bulk of a full-size optic. UTG designs this sight with a side-loading battery compartment, making battery changes simple without needing to remove the optic from your mounting platform first, and pairs it with a light-sensing feature for reliable visibility across changing conditions. It is a practical option for pistol or compact carbine shooters who want quick target acquisition in a small footprint.

Key Specifications

• Uses a 4.0 MOA red dot for precise, fast aiming.
• Battery compartment is side-loading for easy access.
• Includes a light-sensing feature for the dot.
• Built as a micro-size red dot sight.
• Ships at approximately 0.27 lb, keeping the optic light on a pistol or carbine.

Frequently Asked Questions

What dot size does this optic use? A 4.0 MOA dot.

How do I change the battery? Through the side-loading battery compartment, without removing the optic from its mount.

Is this a full-size or micro red dot? A micro-size red dot sight.

Buy the UTG OP3 Micro Red Dot, 4.0 MOA, Side Loading

This micro red dot delivers a fast 4.0 MOA aiming point with an easy side-loading battery swap. Order from our Leapers lineup in our red dot sights category, shipped fast from our Lubbock, Texas gun shop.