Spike RD3-018 Red Dot Sight for Optics Ready Pistols - Auto Brightness

In this review the Ade Advanced Optics Spike RD3-018 red dot is examined as a compact, low-power sight for optics ready pistols. The bottom line: it is aimed at shooters who want a lightweight, durable red dot with auto-brightness and broad mounting compatibility, and its single best reason to buy is the combination of a metal body and automatic brightness that preserves battery life while staying ready. The review covers fit, build, and real-world tradeoffs so buyers know whether it suits their carry or range pistol.

Key Features

• Extensive compatibility: Fits a long list of optics-ready pistols and any slide or mounting plate using the RMS/RMSC screw footprint, making it versatile across many handgun platforms.
• Durable construction: Hard coated aircraft aluminum housing and multi-coated glass give a solid, metal-built sight rather than a plastic or polymer body.
• Automatic brightness: Sensor-activated brightness adjusts the dot intensity to ambient light so the sight is usable in varied lighting without manual settings.
• Low power consumption: Runs on a single CR2032 3V battery and draws about 700 microamperes, extending time between battery changes while remaining powered on.
• Compact and lightweight: A 4MOA dot in a package about 1.6 in long and roughly 0.62 oz makes it unobtrusive for carry pistols and competition use.
• Screws included for select models: Comes with screws for several optics-ready handguns so many users can install without sourcing additional hardware.

Who It's For

The Spike RD3-018 is best for shooters who own an optics-ready pistol or a slide with an RMS/RMSC footprint and want a metal-bodied, always-on red dot that handles everyday carry and range use. It appeals to those prioritizing low weight and automatic brightness so they do not need to fiddle with settings between indoor and outdoor shooting.

This sight is less suitable for someone who requires a specific mounting plate or a full accessory kit; it does not include dedicated mounting plates or picatinny adapters, and buyers must confirm MOS compatibility for Glock 43X/48 models. Those who demand extremely long proven battery life or prefer manual brightness control might look at other models.

Pros & Cons

Pros

• Metal construction and multi-coated glass deliver durable, premium feel compared with polymer-bodied options.
• Automatic brightness and low current draw keep the sight usable across lighting conditions without frequent battery swaps.
• Very lightweight and compact, making it unobtrusive for carry pistols and comfortable for extended use.
• Broad compatibility with many optics-ready pistols and RMS/RMSC plates increases versatility.

Cons

• Some users report mixed battery life and occasional dead batteries on arrival, so initial battery checks are recommended.
• Does not include dedicated mounting plates or a picatinny adapter, so additional hardware may be required for some guns.

Specifications

Brand	Ade Advanced Optics
Model	Spike RD3-018
Dot size	4MOA
Battery	Single CR2032 3V
Material	Hard coated aircraft aluminum, multi-coated glass
Weight	Approximately 17.6 grams (0.62 oz)
Dimensions	Length 1.6 in x Width 0.92 in x Height 0.93 in

Our Verdict

The Spike RD3-018 is a sensible value for owners of optics-ready pistols who want a compact, metal-bodied red dot with automatic brightness and low power draw. It pairs a lightweight footprint with broad RMS/RMSC compatibility, making it a practical choice for carry and range use, though buyers should verify mounting hardware needs and check the battery on arrival.

Frequently Asked Questions

Will this fit my pistol?
It fits pistols and slides that use the RMS/RMSC screw pattern and several named models, but verify MOS status for Glock 43X/48 and check whether your make is listed.

What battery does it use?
The sight uses a single CR2032 3V battery and is designed for low current draw to extend service life.

Does it come with mounting plates?
No, it ships with screws for select models but does not include dedicated mounting plates or picatinny adapters.