SIG SAUER P320 POLICE TRADE IN 9MM 3.9″ (3) 17RD PISTOL W/ ROMEO 1 PRO, USED VERY GOOD CONDITION – W320CA-9-BXR3-PRO-RXP

Law enforcement trade-ins may show slide or holster wear. All wear is cosmetic and does not affect function. Actual product may vary from images shown.

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SIG SAUER P320 Police Trade-In 9MM 3.9” Pistol w/ ROMEO1 PRO – (3) 17-Round Magazines – USED VERY GOOD CONDITION

Model Number: W320CA-9-BXR3-PRO-RXP

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Overview

The SIG SAUER P320 Police Trade-In 9mm 3.9” Compact Pistol with ROMEO1 PRO red dot sight is a tactical, versatile, and highly functional firearm ideal for personal defense, tactical duty, or range use. This particular model, sourced from law enforcement inventory, comes in Used – Very Good Condition, meaning it’s been professionally inspected and graded, retaining both mechanical integrity and cosmetic appeal. With three 17-round magazines, a 3.9” barrel, and an included SIG ROMEO1 PRO optic, this pistol delivers modern performance and trusted reliability at a more accessible price point.

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Key Features

• Police Trade-In – Used Very Good Condition

• Chambered in 9mm Luger

• 3.9-inch Carbon Steel Barrel

• ROMEO1 PRO Red Dot Sight Factory Mounted

• Three (3) 17-round Steel Magazines

• X-Ray3 Day/Night Sights (Co-witness Ready)

• Striker-Fired Operating System

• Modular Serialized Fire Control Unit (FCU)

• Black Nitron™ Finish

• Coyote Tan Grip Module

• Optics Ready Slide – Compatible with ROMEO1 PRO and other optics

• Picatinny Rail for Accessories

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Why Buy a Police Trade-In SIG P320?

1.

Cost-Effective Access to a Premium Firearm

Police trade-in firearms offer a significant value proposition. These are not civilian hand-me-downs or damaged goods — they are duty-issued pistols that were regularly maintained and rarely abused. SIG SAUER’s durability and reliability mean that even after years of police service, this P320 is ready for years of performance.

You’re getting a battle-tested SIG firearm that has seen action in real-world environments. Every police trade-in unit undergoes evaluation and grading, and this model is rated “Used – Very Good”, which typically means minimal cosmetic wear, a pristine bore, and a 100% functional condition.

2.

Factory-Mounted ROMEO1 PRO Optic

A standout feature is the ROMEO1 PRO red dot optic, mounted directly to the slide. This optic is highly regarded for its crisp 3 MOA red dot, motion-activated illumination, top-loading battery, and rugged aluminum housing. Designed specifically to withstand the demands of slide-mounted recoil, the ROMEO1 PRO allows for quicker target acquisition, faster follow-up shots, and improved accuracy in both low- and bright-light conditions.

The factory mounting ensures perfect alignment, rugged reliability, and co-witnessing with the suppressor-height X-RAY3 backup iron sights.

3.

Proven P320 Platform

The SIG SAUER P320 has earned its reputation as one of the most versatile, modular, and dependable handguns in the world. Selected by the U.S. military for the Modular Handgun System (MHS) program, the P320’s modular Fire Control Unit (FCU) can be swapped into different grip modules and slide/barrel assemblies — giving you options to configure the firearm as a full-size, carry, compact, or subcompact pistol.

This model features a compact 3.9” barrel, making it well-balanced for concealed carry, home defense, and duty use.

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Condition Grading – What “Very Good” Means

• Mechanics: 100% functional with no defects in operation. The trigger, slide, safety, and magazines function as intended.

• Barrel: Clean, bright bore with strong rifling. No pitting or corrosion.

• Cosmetics: Light wear from holster use; minor handling marks but no cracks, gouges, or damage.

• Optic: Fully functional ROMEO1 PRO with clear glass, responsive controls, and secure mounting.

• Sights: X-RAY3 day/night sights remain bright and co-witness with the optic.

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Advantages of the SIG ROMEO1 PRO

• 3 MOA Red Dot: Crisp and precise aiming point for defensive and competitive shooting.

• TruHold Lockless Zeroing System: Resists zero shift under repeated recoil.

• MOTAC™ Technology: Motion-activated illumination saves battery life and ensures readiness.

• Aircraft-Grade Aluminum Housing: Durable, lightweight, and impact-resistant.

• Top-Loading Battery: No need to remove the optic to replace the CR1632 battery.

• Wide Field of View: Fast target acquisition in both close quarters and medium-range engagements.

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Applications & Use Cases

✅

Home Defense

With 17+1 rounds of 9mm and a mounted red dot optic, this firearm gives you fast acquisition, low recoil, and high stopping power in a compact frame suitable for maneuvering indoors.

✅

Concealed Carry

Despite having a ROMEO1 PRO mounted, the pistol remains compact and can be carried concealed with the right holster. The 3.9” barrel balances concealability with performance.

✅

Law Enforcement / Security

This was originally a duty pistol, and it remains highly suitable for patrol, executive protection, or private security.

✅

Target Shooting / Training

Train like a pro with the same red-dot setup used in modern combat pistols. The red dot makes it easier to focus on your target and improve groupings.

✅

Collection / Backup Firearm

Police trade-in firearms are not only affordable but often collectible, especially when they come with upgraded optics like the ROMEO1 PRO. It also serves well as a reliable backup gun.

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Why Choose SIG SAUER?

SIG SAUER is known globally for its precision engineering, unmatched reliability, and industry-leading innovation. Whether in the hands of elite military units, law enforcement agencies, or responsible civilians, SIG pistols like the P320 deliver top-tier performance. With its modular platform, advanced ergonomics, and proven track record, the P320 is a favorite among tactical shooters and gun enthusiasts alike.

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Maintenance Tips for Trade-In Firearms

• Thorough Cleaning: Perform a full disassembly, clean the bore, slide, frame, and all internals to remove residue from prior use.

• Lubrication: Use high-quality gun oil to ensure smooth slide function and proper cycling.

• Sight Calibration: Confirm zero on the ROMEO1 PRO for accuracy.

• Inspection: Check springs, striker, and extractor for wear (though these parts typically last tens of thousands of rounds).

  SIG SAUER P320

  SIG SAUER P320

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Compatibility and Modularity

This SIG P320 can accept a wide range of grip modules, slide lengths, and FCU-compatible accessories. Want a full-size grip? A subcompact slide? Threaded barrel? All are available through SIG’s modular design philosophy. sig sauer p320

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Compliance Note

Before purchasing, please ensure this model is compliant with your local, state, or federal firearm regulations. Some jurisdictions restrict magazine capacity or require red dot-equipped pistols to be registered.

SIG SAUER P320

SIG SAUER P320

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Final Thoughts

The SIG SAUER P320 Police Trade-In 9mm 3.9” Pistol w/ ROMEO1 PRO delivers unmatched value by combining duty-grade reliability with modern optics and performance upgrades. Whether you’re looking to add a red-dot-ready pistol to your collection, upgrade your home defense setup, or train with a professional-grade weapon, this trade-in P320 offers outstanding performance and modularity without the new-in-box price.

SIG SAUER P320

SIG SAUER P320