Update for Virginia Customers: Shipments of affected firearms and magazines to Virginia addresses are temporarily paused due to pending legal cases and unclear court guidance. We will resume shipping the moment we have a clear legal resolution.
Check out our wide selection of SIG P320 pistols, parts, and accessories. The SIG P320 is a popular handgun known for being easy to customize, reliable, and well-made. Whether you’re experienced or just starting out, you can find the right model for you - choose from full-size, compact, or small options. We also offer magazines, holsters, sights, and upgrade kits made just for the P320. Shop with us for good prices, fast shipping, and helpful customer service. Upgrade your gear with the trusted SIG P320 today!

The P320 is a popular choice among firearm enthusiasts, law enforcement, and military personnel. Its modular design, reliability, and performance have made it a standout in the world of handguns. Below, we answer some common questions about this model. This will help you make an educated choice when looking at Palmetto State Armory’s selection.
This pistol is well known for being easy to adapt and use in many ways. The P320 is different from most handguns. It has a serialized fire control unit (FCU). This feature lets you easily change grip modules, slides, and barrels.
You can adjust it to match your hand size, favorite caliber, and how you plan to use it. This includes concealed carry, home defense, or competition. Its striker-fired system gives a consistent trigger pull, helping improve both accuracy and ease of shooting.
One of the key advantages of this platform is its ability to accommodate multiple calibers. The most notable options available include:
With the right caliber exchange kit, you can change your pistol to different calibers. This makes it truly adaptable for various shooting applications.
The P320 is available in several sizes to suit different preferences and applications:
You can customize each size with different grip modules and slide lengths. This lets you adjust the pistol to fit your needs.
Barrel lengths range from 3.6"–5.5".
Engineers designed this model for precision and reliability. Key features include:
These features combine to make it a reliable performer in both training and real-world scenarios.
Absolutely. Its modular design renders it among the most adaptable pistols available today. You can easily swap out grip modules to fit your hand size or change the color and texture for a personalized look. Additionally, it supports a wide range of aftermarket accessories, including:
This flexibility allows you to configure your pistol for competition, tactical use, or everyday carry.
The Fire Control Unit (FCU) is the heart of the P320. It comprises the serialized section with the trigger, sear, and other vital parts.
The FCU is easy to remove and install in different grip modules and slide assemblies. This lets you change your pistol into different sizes and calibers without buying a whole new firearm. This innovative design is a major reason for the platform’s popularity.
Many shooters compare this gun to other popular striker-fired pistols, these include the Glock 17, Glock 19, Smith & Wesson M&P, and CZ P-10.
It stands out because of its modular construction, allowing for easy customization and caliber changes. Many professionals appreciate its ergonomic build, trigger feel, and the variety of factory and aftermarket upgrades available. Its adoption by the U.S. military as the M17/M18 further attests to its reliability and performance.
A wide range of accessories is available for the P320, including:
These accessories help improve the function, comfort, and look of your pistol. Accessories help make your firearm feel more personal and unique, tailored to your needs. The 320 is the pinnacle of firearm modification.
This handgun is an excellent choice for both new and experienced shooters. Its intuitive controls, manageable recoil, and customizable grip make it easy to handle and shoot accurately. The consistent trigger pull and clear sight picture also contribute to a positive shooting experience for beginners. With proper training and practice, it can serve as a reliable and versatile handgun for a wide range of users.
The P320 is a highly regarded handgun valued for its modular design, proven reliability, and strong performance. You can use this platform for a duty pistol, a concealed carry option, or a competition-ready firearm. With numerous personalization options available, you can tailor it to your exact preferences.
Check out Palmetto State Armory’s range of P320 pistols, parts, and accessories. You can design the optimal arrangement for your shooting preferences.