---
product_id: 292778903
title: "UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black"
brand: "utg"
price: "€ 194.91"
currency: EUR
in_stock: true
reviews_count: 12
category: "Utg"
url: https://www.desertcart.at/products/292778903-utg-op3-micro-sl-red-4-0-moa-single-dot
store_origin: AT
region: Austria
---

# 4.0 MOA red dot with 8 brightness levels IPX7 waterproof rating 15,000+ hrs battery life UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black

**Brand:** utg
**Price:** € 194.91
**Availability:** ✅ In Stock

## Summary

> 🎯 Lock on, level up, and never miss your mark.

## Quick Answers

- **What is this?** UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black by utg
- **How much does it cost?** € 194.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/292778903-utg-op3-micro-sl-red-4-0-moa-single-dot)

## Best For

- utg enthusiasts

## Why This Product

- Trusted utg brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Targeting:** 4.0 MOA single red dot with 8 adjustable brightness settings for flawless aiming in any light condition.
- • **Unmatched Endurance:** Over 15,000 hours of continuous use on a single battery—stay locked and loaded without interruptions.
- • **Weatherproof Warrior:** IPX7 waterproof rating ensures peak performance rain or shine, so your sight never quits on you.
- • **Effortless Side Loading:** Innovative side-loading battery compartment lets you swap batteries without losing zero—no downtime, no hassle.
- • **Universal Compatibility:** Mounts seamlessly on Picatinny rails with Docter footprint, co-witnessing suppressor-height iron sights for versatile setups.

## Overview

The UTG OP3 Micro SL is a precision-machined, matte black 6061-T6 aluminum red dot sight featuring a 4.0 MOA single dot with 8 brightness settings and a wide 23mm lens. Designed for durability with IPX7 waterproofing and an impressive 15,000+ hour battery life, it offers a side-loading battery compartment that maintains zero during swaps. Compatible with common Docter footprint mounts and includes a low-profile Picatinny base, making it a versatile, reliable optic for handguns and tactical setups.

## Description

UTG OP3 Micro SL, Side Loading Battery Compartment, Red 4.0 MOA Single Dot, Matte Black 6061-T6 Aluminum, 15,000+ Hours Battery Life, Docter Footprint, Compatible with UTG® RDM20 Mounts, Low Profile Picatinny Base, IPX7 Rated, 8 Brightness Intensity Settings, Co-witness with Most Suppressor Height Sights

Review: Good buy - The OP3 is not perfect, but for the price it is a 5-star item. The dot is clear, but at higher brightness it seems to flare out a bit. (Qualifier: not sure if that is because of the product or my astigmatism and correction glasses.) Bringing the brightness level down to what is just acceptable for the ambient light, makes a very fine dot that seems a little less than the advertised 4 MOA and is very good for target shooting. I mounted this on my SW-22 pistol and have been to the range 4 times. The sight was very easy to zero; and so far; has held zero. The 8 brightness levels cover bright daylight to nighttime. On the downside: the parallax is set at infinity, so at close distances, when moving the dot around the lens, there is some shift of the aim point. I estimated this to be about ¼” at 15 yards max when moving from center to outside edge. Of course if you zero with the dot in the center and hold it there when shooting, there is no shift. So, for target shooting at 25 yds, I keep the dot in the center. If close self-defense off hand shooting is your thing, would you care about a ¼” or ½” shift? Another downside is there is no auto shutoff. At about ½ the price of the next good red dots and about ¼ of the high-end models, I am very satisfied with this product.
Review: Just bought my second Op3 SL - The first Op3 SL I tried on my G23; it worked out great, shot about 150 rounds. Held zero perfectly. Took the battery out via the nifty drawer on the side (you won't have to remove the whole unit and then re-zero) and replaced the battery - it held zero just as designed. I liked it so well I just bought my second Op3 for another pistol, and I will very likely get a third unit for a secondary sight on one of my AR's. Love these things, such a great value👌

## Features

- Precision Machined from 6061-T6 Aluminum Construction Finished in a Matte Black Anodization, IPX7 Waterproof Rated
- Red 4.0 MOA Single Dot with 8 Brightness Intensity Settings to Accommodate Different Weather/Light Conditions, Wide Field of View 23mm Lens
- 15,000+ Hours Battery Life at Middle Brightness Setting, Side Loading Battery Compartment, No Longer Necessary to Remove Sight and Re-zero
- Mounting Base Interface Uses the Common Docter Footprint, Removable Low Profile Picatinny Mounting Base Included
- Co-witnesses with Most Suppressor Height Iron Sights, Rear face of Optic Hood Laser Engraved with Tertiary Aiming Point
- NOTE: We recommend to tighten the #6-48 screw with torque value of about 12 inch-lb and the side plate screw with torque value of about 35 inch-lb.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08T6M8PR9 |
| Best Sellers Rank | #251,519 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #584 in Gun Sights |
| Brand | UTG |
| Brand Name | UTG |
| Color | Black |
| Compatible Devices | Handgun |
| Customer Reviews | 4.2 out of 5 stars 62 Reviews |
| Field Of View | 23 millimeters |
| Included Components | CR 1632 3V High Energy Lithium Battery, Allen Wrench 3mm,T10 Torx Wrench, Cleaning Cloth, Dot Sight Owners Manual, Protective Optic Cove, #6-48 T10 Torx Screw, 7mm X2, M3x0.5 T10 Torx Screw, 7mm X2 |
| Item Dimensions L x W x H | 1.81"L x 1.34"W x 1.81"H |
| Item Type Name | SPORTING_GOODS |
| Item Weight | 1.81 ounces |
| Magnification Maximum | 1 x |
| Magnification Minimum | 1 x |
| Manufacturer | Leapers, Inc. |
| Manufacturer Part Number | OP-RDM20 |
| Material Type | Aluminum |
| Model Name | OP-RDM20CT |
| Model Number | OP-RDM20CT |
| Mounting Type | Picatinny Mount (Removable) |
| Number of Items | 1 |
| Objective Lens Diameter | 23 millimeters |
| Product Dimensions | 1.81"L x 1.34"W x 1.81"H |
| Product Style | Cantilever |
| Reticle Type | Single dot |
| Sport | Airsoft |
| Sport Type | Airsoft |
| Style | Cantilever |
| Unit Count | 1 Count |
| Warranty Description | Lifetime Warranty |

## Product Details

- **Brand:** UTG
- **Color:** Black
- **Compatible Devices:** Handgun
- **Item Weight:** 1.81 ounces
- **Magnification Minimum:** 1 x
- **Material:** Aluminum
- **Objective Lens Diameter:** 23 millimeters
- **Product Dimensions:** 1.81"L x 1.34"W x 1.81"H
- **Sport:** Airsoft
- **Style:** Cantilever

## Images

![UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black - Image 1](https://m.media-amazon.com/images/I/71L+b+P2wtL.jpg)
![UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black - Image 2](https://m.media-amazon.com/images/I/918rux3121L.jpg)
![UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black - Image 3](https://m.media-amazon.com/images/I/818xXRnouTL.jpg)
![UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black - Image 4](https://m.media-amazon.com/images/I/71pjujQ6glL.jpg)
![UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black - Image 5](https://m.media-amazon.com/images/I/81YR7ed0M1L.jpg)

## Questions & Answers

**Q: Does this fit a canik tp9sfx?**
A: Yes, with #1 plate

**Q: Does this have the shake awake feature?**
A: It does not have shake wake. But  overall its a decent sight used and abused on my Gen 3 glock 17

**Q: Does it fit a taurus gx4 toro?**
A: It does not fit the GX4 toro as the GX4 has an rmsc footprint while this fits a Docter/Noblex/Vortex Viper footprint

**Q: Does it fit with the glock 21 gen 4? Thanks!**
A: The Glocks are cut for RMR dots so you’ll need an adapter plate. It has the same footprint as a Burris Fastfire.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good buy
*by W***M on September 5, 2021*

The OP3 is not perfect, but for the price it is a 5-star item. The dot is clear, but at higher brightness it seems to flare out a bit. (Qualifier: not sure if that is because of the product or my astigmatism and correction glasses.) Bringing the brightness level down to what is just acceptable for the ambient light, makes a very fine dot that seems a little less than the advertised 4 MOA and is very good for target shooting. I mounted this on my SW-22 pistol and have been to the range 4 times. The sight was very easy to zero; and so far; has held zero. The 8 brightness levels cover bright daylight to nighttime. On the downside: the parallax is set at infinity, so at close distances, when moving the dot around the lens, there is some shift of the aim point. I estimated this to be about ¼” at 15 yards max when moving from center to outside edge. Of course if you zero with the dot in the center and hold it there when shooting, there is no shift. So, for target shooting at 25 yds, I keep the dot in the center. If close self-defense off hand shooting is your thing, would you care about a ¼” or ½” shift? Another downside is there is no auto shutoff. At about ½ the price of the next good red dots and about ¼ of the high-end models, I am very satisfied with this product.

### ⭐⭐⭐⭐⭐ Just bought my second Op3 SL
*by H***! on February 11, 2022*

The first Op3 SL I tried on my G23; it worked out great, shot about 150 rounds. Held zero perfectly. Took the battery out via the nifty drawer on the side (you won't have to remove the whole unit and then re-zero) and replaced the battery - it held zero just as designed. I liked it so well I just bought my second Op3 for another pistol, and I will very likely get a third unit for a secondary sight on one of my AR's. Love these things, such a great value👌

### ⭐⭐⭐⭐ F around and find out
*by J***D on April 2, 2022*

Not sure if a pistol red dot is the right thing for you? Give this a spin! Installation is easy and easily reversible if you don't like it. Zeroed on the bench with about 5 or 6 rounds and it has held zero for a few hundred since then; so good show right there (used a 15 yd zero). Keeps a 5 inch group at 50 yds, which, for me is outstanding at a range I won't bother with using irons. It sits higher than red dots that sit in machine cuts on the slide, but this will let you know if you want to go to one of those more expensive items. On 2/3 brightness, the battery lasted for about 4.5 months of always on; one reason this review took a good bit to write. Overall, this is a great training tool and experimentation tool. I don't think I'd feel comfortable using this for a serious life and liberty tool, but it is an awesome cost effective way to find out if you want to invest in something like the Holosun 503s or RMRs or Venoms. Pistol red dots aren't for everyone; this is fun, functional, and the perfect way to decide if you want to move from irons to RDS. F around and find out if a pistol RDS is your thing.

## Frequently Bought Together

- UTG OP3 Micro SL, Red 4.0 MOA Single Dot, Side Loading, Black
- UTG Super Slim RDM20 Dovetail Mount, Low Profile, Black

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-09-05*