Sig Sauer P320 Nitron: Enhanced Control with Apex Trigger

As operators and longtime shooters, we look for pistols that balance ergonomics, control, and consistent performance under pressure. The platform that delivers that combination without breaking the bank is rare; what matters most is how the handgun feels and functions when you need it to—whether on the range, in training, or in a defensive scenario.

SIG SAUER P320 NITRON FULL-SIZE

The SIG SAUER P320 NITRON FULL-SIZE is presented as a Certified Used Firearm and includes the original hard case, manual, and two 17-round magazines. At a price point of $569.99, this package offers a robust feature set that reads like an upgraded factory pistol: an XFull frame with added weight, an ambidextrous slide lock, an Apex Tactical trigger bar, and TruGlo TFX Pro fiber optic/night sights. If you want to evaluate this exact offering, Shop this product and review the certified details on the product page.

Design and Ergonomics

The SIG SAUER P320 NITRON FULL-SIZE uses an XFull frame with added weight that changes how the pistol tracks during recoil. That extra mass in the frame reduces muzzle rise and helps keep follow-up shots on target, particularly useful in rapid-fire drills and when using higher-pressure loads. The full-size grip provides a long sight radius and room for a solid two-handed hold, which benefits shooters building consistency.

Controls that work for both hands

An ambidextrous slide lock is included on the SIG SAUER P320 NITRON FULL-SIZE, so left- and right-handed operators can manipulate the slide without changing their grip. Paired with the modular nature of the P320 series, this control layout supports a wide range of users and training scenarios.

Trigger System: Apex Tactical Trigger Bar

One of the stand-out features in this package is the Apex Tactical trigger bar. The upgrade refines the break and reset compared to many factory triggers, smoothing the pull and shortening the reset for quicker follow-up shots. While not an entirely custom trigger, it’s an effective, range-ready improvement that keeps the trigger surface and geometry familiar to shooters who train on striker-fired platforms.

What that means for training

Expect a crisper break and a perceptible reset that promotes better shot cadence. For instructors and trainees, the Apex trigger bar in the SIG SAUER P320 NITRON FULL-SIZE helps bridge the gap between stock triggers and fully tuned competition setups without sacrificing reliability.

Sights and Low-Light Use

TruGlo TFX Pro fiber optic/night sights are installed on the SIG SAUER P320 NITRON FULL-SIZE, offering a dual-purpose sighting solution. During daylight or bright ranges, the fiber optic front improves target acquisition. When light levels drop, the night sight elements provide a visible aiming point without auxiliary illumination. That versatility is valuable for defensive-minded shooters and instructors conducting low-light training.

Magazine Capacity and Practical Considerations

This certified used offering includes two 17-round magazines, which is a practical magazine capacity for a full-size semi-automatic. High-capacity magazines reduce reload frequency during extended drills and allow for realistic training loads that mirror common defensive configurations. Including the original hard case and manual keeps your storage and documentation tidy—important for both ownership and resale value.

Range Impressions and Handling

On the range, the added weight of the XFull frame translates to a steadier sight picture and controllable recoil impulse. The ambidextrous slide lock and improved trigger feel let you maintain focus on fundamentals—sight alignment, trigger control, and follow-through—without compensating for harsh muzzle flip or awkward controls. The TruGlo TFX Pro sights are quick to pick up, especially with the fiber optic front aiding faster target acquisition at short to medium distances.

Training drills to try

Work on controlled pairs, failure-to-stop drills, and transition exercises from strong- to support-hand to fully exploit the SIG SAUER P320 NITRON FULL-SIZE’s ergonomics and ambidextrous controls. Dry-fire practice with the Apex trigger bar installed will reward you quickly with improved trigger management and faster, cleaner trigger presses.

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Certified Used Value Proposition

Certified Used status gives buyers confidence. The SIG SAUER P320 NITRON FULL-SIZE listed here is noted as a Certified Used firearm, meaning it’s held to a quality standard—very good to excellent condition—and it comes with a ‘no questions asked’ return policy. For many shooters, that removes much of the uncertainty tied to buying a pre-owned handgun while keeping cost down from new-equipment pricing.

Maintenance and Upgrades

Routine maintenance—cleaning the slide rails, barrel hood, and recoil spring, and ensuring magazine lips and springs are in good condition—keeps the SIG SAUER P320 NITRON FULL-SIZE running reliably. If you’re looking to personalize further, the P320 modular system supports aftermarket backstraps, optics cuts (on compatible slides), and magazine options. Given the installed Apex Tactical trigger bar and TruGlo sights, the pistol is already well-equipped for many users straight out of the case.

Who should consider this pistol?

The SIG SAUER P320 NITRON FULL-SIZE is a strong option for range-focused shooters, defensive enthusiasts who prefer a full-size platform, and anyone seeking a well-equipped Certified Used pistol at an accessible price. With the Apex Tactical trigger bar, TruGlo sights, ambidextrous controls, two 17-round magazines, and the included hard case and manual, this package provides immediate value for training and personal defense practice.

Ready to take a closer look? Check current availability on the product page and see this certified offering for yourself.

People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.