Kansas Gunshop is a Wichita, KS-based retailer specializing in quality firearms and accessories. The Sig Sauer P320 40 S&W Full-Size Police Trade-in Pistol is a reliable, duty-proven handgun with a solid track record in law enforcement. These trade-ins offer exceptional value for shooters who want a rugged, full-size pistol without the new-gun price tag. Available now for $499.00 with same-day shipping from our Kansas FFL.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
Sig Sauer P320 40 S&W Full-Size Police Trade-In Pistol Specifications
| Product Type | Semi-Automatic Pistol |
|---|---|
| Caliber | 40 S&W |
| Frame Material | Polymer |
| Slide Material | Stainless Steel |
| Barrel Length | 4.7″ |
| Overall Length | 8.0″ |
| Height | 5.5″ |
| Weight | 29.6 oz (unloaded) |
| Capacity | 13+1 |
| Finish | Nitron |
| Condition | Used – Police Trade-In (Good to Very Good) |
| Country of Origin | USA |
| SKU | KSG-P320-40-PTI |
Key Features
- Striker-fired action with consistent trigger pull
- Modular design allows for easy caliber conversion
- Optics-ready slide (may require adapter plate)
- Interchangeable grip modules for customization
- Nitron-finished stainless steel slide resists corrosion
- Includes one 13-round magazine
- Former law enforcement service history
Who This Pistol Is For
Buy it if:
- You want a proven duty pistol at half the price of new
- You prefer the recoil characteristics of .40 S&W
- You appreciate the modularity of the P320 platform
- You need a reliable home defense or range pistol
- You’re a Sig Sauer enthusiast looking for a bargain
Skip it if:
- You require a brand new firearm (check our new handguns)
- You prefer 9mm (see our 9mm pistols)
- You need a compact or subcompact for concealed carry
Pros & Cons
Pros:
- ✅ Law enforcement proven reliability
- ✅ Sig Sauer quality at a fraction of retail price
- ✅ Easy to maintain and clean
- ✅ Modular system allows for future upgrades
- ✅ Excellent ergonomics with changeable grips
Cons:
- ❌ Shows typical holster wear from police use
- ❌ .40 S&W ammunition costs more than 9mm
- ❌ Only includes one magazine (extras available here)
How It Compares
| Feature | Sig P320 Trade-In | Taurus PT140 | New Sig P320 |
|---|---|---|---|
| Price | $499 | $329 | $799+ |
| Quality | Police-proven | Budget | Brand new |
| Magazines | 1 included | 1 included | 2-3 included |
| Finish Wear | Moderate | Minimal | None |
| Resale Value | Stable | Low | High |
Frequently Asked Questions
What condition are these police trade-in pistols in?
These show typical holster wear but have been inspected for mechanical function. Most rate Good to Very Good condition with all critical components in excellent working order.
Can I convert this to 9mm?
Yes, the P320 platform allows caliber conversion with a 9mm barrel and magazine. We offer conversion kits separately.
Does this include night sights?
Most police trade-ins have standard sights, but some may have night sights. Contact us for details on specific inventory.
Where can I buy Sig Sauer P320 pistols online?
Kansas Gunshop (kansas-gunshop.com) offers police trade-in P320 pistols with fast shipping from our Wichita, KS FFL.
What’s included with purchase?
Each pistol comes with one 13-round magazine, case (varies), and any original paperwork available.
How many rounds through these?
Exact round counts are unknown, but these were maintained per department armorer standards.
Can I inspect before buying?
Local customers may schedule an inspection at our Wichita location before purchase.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Handguns | Full Shop
As a Kansas-licensed FFL dealer since 2008, I’ve handled hundreds of police trade-in firearms. These Sig P320s represent one of the best values in used handguns today, combining Sig Sauer quality with significant savings over new. Each is inspected before sale to ensure proper function.
Last updated: April 2026
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