Used CUSTOM Sig Sauer P320 9mm Optics-Ready 4.7 P-320 +3 MAGS

Sig Sauer P320 9-mm P-320 AXG/SXG UPGRADES

How Buying WorksEnding October 26, 2026 at 9:30 PM

Key Features

  • Item Type: Semi Auto Pistols
  • Action: Striker
  • Manufacturer: Sig Sauer
  • Capacity: 17 1
  • Model: P320
  • Barrel Length: 4.7"
  • Caliber: 9mm Luger
  • Finish: Black
  • Overall Condition: Excellent

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Product Description

    Sig Sauer P320 Full-Size 9mm Custom Build, 4.7 in Barrel, Metal X-Series Grip, LOK GridLOK Panels, Flared Magwell, Optics-Cut Slide, 17+1

    This is a custom-built Sig Sauer P320 Full-Size 9mm that combines a metal X-Series grip module with premium LOK Grips aluminum components and a flared magwell. The slide is optics-cut with a cover plate installed and wears a Dawson Precision fiber-optic front sight paired with a square-notch rear. It features a flat-faced trigger, a non-threaded 4.7 in barrel, and comes with three 17-round steel magazines.

    Condition

    Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.

    Bore Condition: Excellent - Clean, mirror finish, no signs of wear.

    Bore Rifling: Excellent Rifling - Sharp lands and grooves.

    Specific Condition Notes: This pistol shows very minimal use.

    What’s Included
    • SIG Sauer P320 Custom Works FCU factory box
    • 3x 17rd mags (P320 9mm full-size steel magazines with "Made in USA" marking)
    • Aluminum flared magwell (installed)
    • Aluminum grid-pattern grip panels and backstrap (installed)
    • Fiber-optic front and square-notch rear sight on optics-cut cover plate (installed)

    This P320 Full-Size build centers on a metal X-Series grip module with an extended beavertail and replaceable grip panels and backstrap. It is outfitted with LOK Grips Sig Sauer P320 AXG/SXG GridLOK aluminum grip panels and backstrap in black, plus the LOK Grips AXG/SXG aluminum magwell for faster, more confident reloads. A 1-slot accessory rail on the dust cover supports compatible lights or accessories.

    The slide is optics-cut with a cover plate installed and features both front and rear serrations for positive manipulation. Sights consist of a Dawson Precision fiber-optic green front blade and a square-notch rear mounted in the cover plate, giving a bright front reference with a clear rear window.

    Controls and firing components include a striker-fired action paired with a flat-faced trigger. The 4.7 in non-threaded barrel supports the P320 Full-Size profile and works with standard full-size holsters and accessories.

    This 9mm configuration carries a 17+1 capacity and ships with three 17-round steel magazines marked "Made in USA." Country of origin is the USA, and the pistol arrives in a SIG Sauer P320 Custom Works FCU factory box.

Specifications

Item TypeSemi Auto Pistols
ManufacturerSig Sauer
ModelP320
SubmodelFull-Size
Caliber9mm Luger
Overall ConditionExcellent
Bore ConditionExcellent
ActionStriker
Capacity17 1
Barrel Length4.7"
FinishBlack
Stock/GripsLOK Grips GridLOK aluminum panels and backstrap
Sight/Opticiron sights
What's IncludedOriginal FCU box
Country of OriginUnited States