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Sig Sauer

SIG SAUER P320 Magazine 9mm 21 Rounds

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Oem Replacement

Magazine for SIG SAUER P320

9mm Magazine

21-round capacity

Steel Body

Anti-friction coating

Steel Spring

For magazine function

Extended Fde

Polymer base plate

$49.99
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SKU: WX2*0710545

Overview

Built as an OEM replacement magazine for the SIG SAUER P320 pistol, this 9mm option is intended for shooters who want a higher-capacity magazine on hand for range sessions or spare carry. It features a steel body with an anti-friction coating, a steel spring, and an extended FDE polymer base plate. With 21-round capacity, it offers a practical way to keep additional rounds ready without changing the platform.

Why Hunters Choose the Sig Sauer

Oem Replacement

Magazine for SIG SAUER P320

21-round Capacity

For extended shooting sessions

Steel Body

Anti-friction coating

Steel Spring

Supports consistent magazine function

Extended Fde

Polymer base plate for easier

Key Features

  • OEM replacement magazine for SIG SAUER P320 pistols
  • 9mm magazine with 21-round capacity
  • Steel body with anti-friction coating
  • Steel spring for magazine function
  • Extended FDE polymer base plate

Best Used For

  • P320 owners wanting an OEM replacement magazine for range or training use
  • Shooters who prefer a 21-round capacity magazine for fewer reloads
  • Users seeking a magazine with an extended FDE polymer base plate
  • Hunters or outdoorsmen carrying a SIG SAUER P320 as a sidearm
  • Those replacing a worn magazine with a factory-spec option

Specifications

Base PlateExtended FDE polymer base plate
Body MaterialSteel
Caliber9mm
Capacity21 rounds
CoatingAnti-friction coating
CompatibilitySIG SAUER P320 pistol
Magazine TypeOEM Replacement Magazine
Spring MaterialSteel

Pros

  • OEM replacement magazine for SIG SAUER P320 pistols
  • 21-round capacity for extended shooting sessions
  • Steel body with anti-friction coating
  • Steel spring supports consistent magazine function
  • Extended FDE polymer base plate for easier handling

Considerations & Trade-offs

  • 21-round capacity may be more than you need for compact carry or lighter field use, so it adds size and weight compared with lower-capacity options.
  • This is an OEM replacement magazine for the SIG SAUER P320, so it is intended for that platform rather than as a universal 9mm magazine.
  • The extended FDE polymer base plate can make the magazine easier to handle, but it also adds length below the grip.
  • The steel body with anti-friction coating and steel spring are practical features, but the listing does not provide further performance details beyond the stated design.

Suggested Comparisons

  • Pistol magazines
  • Extended-capacity magazines
  • OEM replacement magazines
  • SIG SAUER P320 accessories

Suggested Accessories

  • Pistol magazine pouch
  • Magazine loader
  • Range bag
  • Cleaning kit

Frequently Asked Questions

What pistol is this magazine made for?

It is an OEM replacement magazine for the SIG SAUER P320 pistol.

What caliber and capacity does it hold?

It is a 9mm magazine with a 21-round capacity.

What materials or features are listed for the magazine body and spring?

The listed features are a steel body with anti-friction coating and a steel spring.

Does it include an extended base plate?

Yes. The product description lists an extended FDE polymer base plate.

Is this described as an original SIG SAUER magazine?

Yes. The product is described as an OEM replacement magazine.