The SIG P320 is one of the most popular handguns available today. It is a reliable, accurate, and easy to use semi-automatic pistol. Many people wonder if they can install an RMR (Ruggedized Miniature Reflex) sight on the SIG P320. The answer is yes! Installing an RMR on a SIG P320 can give the user even more accuracy and precision when shooting.

Everything You Need to Know About Installing an RMR on a SIG P320

Installing an RMR (Ruggedized Miniature Reflex) sight on a SIG P320 involves a few steps. First, you must purchase the Sig P320 RMR mounting plate, which is specifically designed for the P320. After the plate is installed, your slide must be machined for the RMR to fit properly. This process requires a skilled gunsmith to cut the slide and properly fit the sight. Once the slide is machined, you can install the sight into the mounting plate.

When installing the sight, make sure to use the proper tools, such as a torque driver, to prevent stripping the screws. It is also important to use the proper thread locker on the screws.It ensures that the sight is securely fastened. Once the sight is installed, you will need to zero the sight to the gun. This should be done with a bore sight laser. It will help you to get the sight properly aligned with the bore.

It is also important to make sure that you properly mount the sight to the slide. This will help ensure that the sight is securely fastened and that the accuracy of the sight is not affected.

In conclusion, installing an RMR on a SIG P320 requires the proper tools and skill.

Pros and Cons of Installing an RMR on a SIG P320

The installation of a Ready Modular Rail (RMR) on a SIG P320 can be beneficial in some cases. But there are also some drawbacks to consider.

The pros of installing, it enhanced accuracy, better recoil management, increased modularity, and improved overall performance. With an RMR, the user is able to mount optics, lights, and other accessories directly onto the slide. It increase accuracy and better recoil management. Additionally, the increased modularity of an RMR-equipped P320 means that the user can easily modify and customize the firearm to their specific needs.

On the other hand, the cons of installing an RMR on a SIG P320 include increased cost, the need for gunsmithing, and the potential for decreased reliability. The cost of an RMR and the necessary gunsmithing to install it can be prohibitive for some users. Additionally, the increased complexity of an RMR-equipped P320 could potentially lead to decreased reliability, as it could be more prone to jams or other malfunctions.

Ultimately, it is up to the user to weigh the pros and cons of installing an RMR on a SIG P320 before making a decision. An RMR can be beneficial in some cases, but the user should consider the potential drawbacks before investing in an RMR-equipped P320.

Select the Right RMR for Your SIG P320

Selecting the right RMR (Red Dot Sight) for your SIG P320 can be a daunting task, as there are many options available on the market. However, with a few basic tips, you can easily find the right RMR for your needs.

First, it is important to consider the type of shooting you plan to do with your P320. This will determine the size, shape, and features needed in your RMR. For example, a competition shooter may prefer a larger, open-emitter RMR, while a concealed carry user may prefer a slim, low-profile model.

Can You Put An Rmr On A Sig P320
Can You Put An Rmr On A Sig P320

Next, you should consider the size and weight of the RMR. Smaller, lighter models are preferred for concealed carry, while larger, heavier models may be better suited for competition or tactical use. Additionally, you should consider the mounting system of the RMR. Make sure to choose one that is compatible with your P320 and the type of mounting system you plan to use.

Finally, you should consider the features of the RMR. Look for models that offer adjustable brightness, reticles, and other features that will suit your shooting needs.

Step-by-Step Guide for Installing:

  1. Start by removing the existing trigger assembly from the P320 and replacing it with the RMR trigger assembly. Make sure to align the slot on the trigger bar with the trigger pin so that it is properly seated.
  2. Once the trigger assembly is installed, attach the RMR plate to the slide. Make sure that the plate is properly seated and that the fasteners are tight.
  3. Attach the mounting plate to the RMR plate. Make sure that the screws are tight and that there is no movement in the mounting plate.
  4. Insert the RMR into the mounting plate and secure it with the provided screws.
  5. Once the RMR is securely mounted, test the functionality of the firearm to make sure that it is operating correctly.
  6. Adjust the elevation and windage screws on the RMR to ensure that the sight is zeroed in.
  7. Finally, check the function of the firearm one more time to ensure that everything is working properly.

Common Issues When Installing an RMR on a SIG P32

The most common issue is that the RMR won’t fit properly on the slide. This can be caused by a number of things It includes the slide being too narrow or too thick to accommodate the RMR, or the cut for the RMR not being cut to the correct dimensions. To ensure that the RMR fits properly, it is important to ensure that the slide is cut to the correct dimensions and that the RMR is the correct size for the slide.

Another common issue is that the slide isn’t cut deep enough for the RMR to be securely mounted. If the cut isn’t deep enough, the RMR can be loose and not fit correctly. To ensure that the slide is cut correctly, it is important to use the correct tools and follow the manufacturer’s instructions. It is also important to use a high quality RMR to ensure that it fits properly and is securely mounted.

Finally, it is important to test the RMR after installation to ensure that it is securely mounted and functioning properly. This can be done by testing the RMR’s dot or reticle,

Tips for Maintaining Your SIG P320 With an RMR Installed

First and foremost, you should ensure that you are cleaning your firearm regularly. This means disassembling the firearm and cleaning each individual piece with a quality gun oil. You should also be sure to clean the barrel of the weapon. It ensures that it is free of any dirt or debris. Additionally, you should wipe down the exterior of the firearm to keep it free of any sweat or dirt that could potentially cause corrosion or other damage.

Another important step in maintaining your SIG P320 with an RMR installed is to check the firearm regularly for any signs of wear or damage. This includes checking the screws. And other fasteners for tightness, ensuring that the RMR is securely mounted, and ensuring that the sight is aligned properly. Additionally, you should check the battery in the RMR on a regular basis and replace it when necessary.

Finally, you should always ensure that you are using quality ammunition when shooting your SIG P320 with an RMR installed. Using low-quality ammunition can cause issues with the firearm, including jamming or misfires. Additionally, using high-quality ammunition can help to increase the overall lifespan of the weapon.

Following these tips will help to ensure that your SIG P320 with an RMR installed stays in great condition for years to come.

Frequently Asked Questions[FAQs]

What is an RMR?

RMR stands for Ruggedized Miniature Reflex sight, which is a type of reflex sight manufactured by Trijicon. It is a ruggedized, miniature red dot sight that is typically used for faster target acquisition and increased accuracy.

Why should I put an RMR on my Sig P320?

Installing an RMR on your Sig P320 can provide a number of benefits. It can provide you with faster target acquisition due to its wide field of view and bright illuminated red dot, increased accuracy thanks to the precise aiming point, and a more durable and ruggedized design that can withstand the abuse of everyday use.

What type of RMR is compatible with the Sig P320?

The Sig P320 is compatible with a variety of RMR sights including the Trijicon RMR, the Leupold DeltaPoint Pro, the Vortex Venom, and the Burris FastFire III.

Is it easy to install an RMR on a Sig P320?

Installing an RMR on a Sig P320 is easy and straightforward. It is highly recommended to have a gunsmith install the RMR, however, with the correct tools and some basic knowledge of firearms, it is possible to install the RMR yourself.

What kind of tools do I need to install an RMR on a Sig P320?

You will need a set of Torx screwdrivers, a small flathead screwdriver, a set of hex keys, and a small hammer or mallet. You may also need a set of punches and a set of Allen wrenches if your model of RMR requires them.

Do I need to make any modifications to my Sig P320 to install an RMR?

Depending on the model of RMR you choose, you may need to make modifications to your Sig P320 in order to install the sight. Some models require a dovetail cut, while others require the slide to be milled to accept the sight. It is important to check with the manufacturer of your RMR to ensure that your Sig P320 is compatible with the sight.

How long does it typically take to install an RMR on a Sig P320?

The installation time will depend on the model of RMR and the level of experience of the person performing the installation. Generally, an experienced gunsmith can complete the installation in approximately 30-45 minutes.

Are there any risks associated with installing an RMR on a Sig P320?

As with any firearms modification, there is always a risk of potential damage to the firearm. It is important to ensure that the RMR is installed correctly and that all safety precautions are taken. Additionally, it is important to use the correct tools and to read and follow all installation instructions carefully.


The Sig P320 is a reliable and popular handgun, and its compatibility with an RMR sight has made it an even more attractive choice for many shooters. With the right parts and installation, it is possible to mount an RMR on a Sig P320, allowing you to customize your handgun to perfectly meet your shooting needs.

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