How to choose a red dot for IPSC shooting pistols

Pistol red dots: why they have become a standard in practical shooting

In recent years, the red dot mounted on a pistol has moved from being equipment reserved for the Open division to a widespread choice even among those competing with production pistols. The reason is simple: a light point projected onto a single focal plane allows you to keep your eyes on the target, reduce acquisition times, and simplify sight management compared to aligning a front and rear sight. Choosing the right model, however, is not just a matter of brand: the dot size, the window, the mounting type, the power source, and, above all, compatibility with your pistol and the division you intend to compete in all matter.

In this guide, we analyze the main criteria to evaluate before purchasing, with a practical approach designed for those who practice IPSC practical shooting.

Dot size: what MOA means

The dot size is expressed in MOA (Minute of Angle). One MOA corresponds to approximately 2.9 cm at 100 meters: therefore, a 3 MOA dot covers approximately 8–9 cm at 100 m and about 2 cm at 25 m. In practical shooting, distances are generally short or medium, but targets can vary greatly within the same course of fire.

• Small dots (approx. 1–3 MOA): cover less of the target and favor precision on distant or partially covered targets.
• Medium and large dots (approx. 4–6 MOA and larger): are easier to find during the draw and rapid transitions, at the expense of greater target coverage at distance.
• Multiple reticles: some models allow you to choose between a single dot, circle and dot, or other configurations, useful for adapting the optic to the type of exercise.

There is no absolute "right" size: many practical shooters prefer medium or large dots for speed, while those seeking precision at long distances tend toward smaller dots. Brightness adjustment is also important: a dot that is too intense appears larger and blurry, especially for those with slight astigmatism.

Window, glass, and emitter type

The window is the area through which you view the dot. A wider window makes it easier to find the dot when your grip or alignment is not perfect, for example during a fast draw or in awkward positions. Conversely, optics with larger windows are often bulkier and heavier, an aspect to consider for slide balance.

Other elements to evaluate:

• Open or closed emitter: in open emitter models, the LED is exposed and can be obscured by dust, rain, or debris; closed emitter models protect the LED inside a sealed body, at the cost of generally being bulkier.
• Glass quality and color tint: some lenses have a slight tint, which can affect the perception of targets.
• Dot color: red and green are the most common; the choice often depends on individual perception.
• Ruggedness: on a pistol slide, the optic undergoes repeated shocks and accelerations with every shot, so it is best to look for models specifically designed for pistol use.

Mounting footprints: RMR, DeltaPoint, ACRO, Docter

One of the most important, and often underestimated, aspects is the mounting footprint, i.e., the arrangement of the screws and alignment pins on the base of the optic. The optic and the pistol (or adapter plate) must have the same footprint.

• Trijicon RMR: one of the most widespread footprints; several manufacturers make optics compatible with this standard.
• Leupold DeltaPoint Pro: unique footprint of the DeltaPoint series, supported by many plates and some optics-ready slides.
• Aimpoint ACRO: typical of compact, closed-emitter optics, it uses a specific mounting system that requires dedicated plates or slides.
• Docter/Noblex: a historical footprint adopted by various models from other manufacturers, very common on compact and entry-level optics.

There are also other specific footprints, for example for subcompact optics intended for concealed carry pistols. Before purchasing, always verify the footprint indicated by the optic manufacturer and compare it with that of your pistol or the plate you intend to use.

Optic-ready pistols, plates, and mounts

The main mounting solutions are three:

1. Optic-ready pistols: many manufacturers offer versions with a pre-milled slide and a set of interchangeable plates for the most common footprints. It is the simplest solution, but it is worth checking which plates are included and which need to be purchased separately.
2. Slide milling: for non-prepared pistols, it is possible to have the slide milled by a qualified gunsmith, obtaining a low and solid mount. It is a permanent intervention to be carefully considered.
3. External bases and mounts: particularly in the Open division, the optic is often mounted on mounts attached to the frame rather than the slide, a configuration that allows for larger optics.

Regardless of the solution, use screws of the correct length, respect the tightening torques indicated by the manufacturer, and, if required, apply appropriate thread locker. Screws that are too long can interfere with the firing pin or other internal parts of the slide. Also consider the height of the optic in relation to the iron sights: some configurations allow for suppressor-height sights to be used as a backup reference visible through the window.

Power and battery life

Most pistol red dots are powered by lithium button batteries, such as the CR2032 or CR1632; the stated battery life varies greatly from model to model and depends on usage intensity. Aspects to consider:

• Battery compartment location: with a side or top compartment, the battery can be replaced without removing the optic; with a bottom compartment, you must remove it from the pistol and, generally, re-verify the zero.
• Automatic shut-off and motion activation: features that, where present, help preserve battery between sessions.
• Automatic brightness adjustment or auxiliary power: some models have light sensors or solar cells for support.

A good practical tip is to replace the battery at regular intervals, for example before an important match, without waiting for it to run out.

Red dots and IPSC divisions

The IPSC regulations provide for different divisions, each with its own equipment rules. In general terms:

• Open: is the division with the fewest restrictions on the firearm; optics are permitted and are often mounted on the frame, along with other modifications like compensators.
• Production Optics: designed for production-based pistols with the optic mounted on the slide; regulations include limitations on the firearm, modifications, and the characteristics of the optic and its mount.
• Carry Optics: is the name of the similar division used in the USPSA (American) rules, with its own rules that do not necessarily coincide with those of the IPSC.

Other pistol divisions, such as Standard, Classic, and Production, require iron sights. Since regulations are updated periodically and may provide precise limits on size, weight, mounting, and permitted modifications, always verify the current IPSC regulations and any provisions of your national federation before purchasing an optic intended for competition.

Quick checklist before buying

• The division you compete in and its rules on optics.
• Mounting footprint compatible with your pistol or available plate.
• Dot size suitable for your shooting style.
• Window size and overall bulk.
• Open or closed emitter.
• Battery type and compartment location.
• Screws, plates, and accessories necessary for mounting.

Discover red dots and accessories on Planet Shooters

You can find all available models in the Red dot and holosight collection, along with plates, mounts, and protective covers in the Optic accessories section. You can also explore optics by brand, such as Trijicon, Leupold, and Vortex Optics, or all the equipment dedicated to IPSC practical shooting.