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SIG SAUER P320 9MM LUGER (9x19 PARA)
Guns International #: 103340973 Seller's Inventory #: 587168
Category: Sig Sauer Pistols - P320 - 9mm Pistols
Seller's Information
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Seller: Guns Dot Com
Member Since: 9/8/21
State: Minnesota
Zip: 55337
Country: United States
Phone: (866) 582-4867
Platinum Seller
Number of Active Listings: 42618
Total Number of Listings: 390578
Seller: FFL Dealer
Return Policy: 3 day inspection and return policy on used guns.
CERTIFIED USED GUNS Guns Certified Used Guns may be returned within 3 days after the transfer is complete for any reason for a full refund, minus any fees, shipping costs and a 15% restocking fee. A Guns Certified Used Gun may also be returned within 7 days if it is malfunctioning with proper use. NON-CERTIFIED USED GUNS Non-certified used guns can be returned if there is a mechanical defect that occurs within 3 calendar days of the physical transfer of the firearm to your possession. All other reasons for returns on non-certified used guns are ineligible.
Payment Types Accepted: Discover, Visa, MasterCard, American Express. Financing options also available.
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Description:
Guns Listing ID: 587168
The P320 is a striker-fired, polymer-frame pistol family from SIG Sauer introduced in the mid-2010s. Its standout feature is a **modular fire-control unit (FCU)** — the serialized chassis — which lets you change frame sizes, slides, and calibers without buying a whole new gun.
* **Modular FCU (fire control unit)** — serialized part; swap chassis between grip modules and slide assemblies to change size/caliber.
* **Striker-fired action** with multiple trigger variants (stock, X-Series flat trigger, and aftermarket upgrades).
* **Interchangeable grip modules** (Full, Carry, Compact, Subcompact, X-Series ergonomics).
* **Calibers** commonly produced: 9mm (most common), .40 S&W, .357 SIG (less common), .45 ACP (X-Full/X-Compact conversions possible with the right slide/barrel/kit).
* **Accessory rail** on most full/compact slides for lights/lasers.
* **Optics-ready models** (RX, XSeries RX) or slides with removable cover plates to mount red dots (footprint depends on slide/plate).
# Common variants (overview)
* **P320 Full / Carry / Compact / Subcompact** — size/slide length differences for carry vs duty vs competition.
* **P320 XSeries (XCarry, XCompact, XFull, XFive Legion, etc.)** — upgraded ergonomics, improved triggers, extended controls, often marketed for competition and carry.
* **P320 RX / optics-ready models** — sold with milled slides or cover plates for mounting red dot optics; sometimes bundled as “X Combo" with a SIG red dot.
* **P320 M17 / M18** — military contract variants (M17 is full size, M18 is carry-size) with specific features.
**Concealed carry**: Carry/Compact/Subcompact grip + short slide.
* **Duty / home defense**: Full/XFull with higher capacity mags and longer sight radius.
* **Competition**: XSeries and optics-ready slides; aftermarket triggers and barrels.
* **Modular hobbyist**: switch FCU into different size modules for multiple roles.
# Upgrades & accessories people commonly add
* **Aftermarket triggers** (crisper pull, shorter reset) — many reputable makers.
* **Optics**: ROMEO series, RMR, RMSc alternatives — confirm slide footprint or use optics-ready slide.
* **Barrels**: threaded barrels for suppressors, match barrels for accuracy.
* **Slides**: optics-ready or custom serrations, coatings.
* **Holsters**: get one cut for the exact slide + optic combo.
* **Sights**: suppressor-height sights for co-witness with red dots, night sights (tritium).
(1)15+ RND MAG
Streamlight TLR-7X
Sig Sauer Romeo 1 Pro
Price: $949.99
Manufacturer: SIG SAUER
Model: P320
Caliber Info: 9MM LUGER (9x19 PARA)
Condition: Used - Non-Certified
Barrels: 4" BARREL
Action: SEMI AUTOMATIC
Finish: black