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Promag Sig P320 Handgun Magazine Blued Steel 9mm Luger 21/rd

⚠ WARNING: This product can expose you to chemicals including lead and other substances known to the State of California to cause cancer and birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov.
(image for) Promag Sig P320 Handgun Magazine Blued Steel 9mm Luger 21/rd
Promag Sig P320 Handgun Magazine Blued Steel 9mm Luger 21/rd
  • Model: ZMSIGA20
  • Shipping Weight: 0.3 lbs
  • 2 Units in Stock
  • Manufactured by: ProMag

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$23.99

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If you are searching for an item that is not currently listed or shows as out of stock, we encourage you to contact us directly. In many cases, we can source products through our distributor network or special order items on your behalf. Our goal is to ensure you get what you need, even if it is not immediately available through our online inventory.

The ProMag SIG P320 21-round magazine is a high-capacity replacement magazine designed for SIG Sauer P320 pistols chambered in 9mm Luger. Built with durable materials and precision engineering, this 21-round handgun magazine provides reliable feeding and extended capacity for range training, recreational shooting, and spare magazine carry.

Constructed from heat-treated blued steel, the magazine body is engineered for strength, durability, and long service life under regular use. The corrosion-resistant finish helps protect the magazine while maintaining smooth and reliable operation.

Inside, the magazine features an injection-molded follower and a heat-treated chrome-silicon wire spring, designed to promote consistent cartridge presentation and dependable cycling in compatible SIG Sauer P320 pistols.

With its 21-round extended capacity, this magazine allows shooters to spend more time shooting and less time reloading during extended range sessions. Designed for proper fit and function, it serves as an excellent option for training, backup magazines, or range use with the SIG P320 platform.

Whether you are replacing worn magazines or adding high-capacity options to your gear, the ProMag SIG P320 9mm 21-round blued steel magazine offers dependable construction and consistent performance.

Features

  • Designed for SIG Sauer P320 pistols
  • Chambered for 9mm Luger
  • 21-round extended capacity
  • Durable heat-treated blued steel magazine body
  • Injection-molded follower for reliable feeding
  • Chrome-silicon spring for consistent performance
  • Engineered for smooth operation and dependable cycling
  • Ideal for range use, training, or spare magazine storage

Specifications

  • Manufacturer: ProMag
  • Model: SIG-A20
  • Fits: SIG Sauer P320
  • Caliber: 9mm Luger
  • Capacity: 21 Rounds
  • Magazine Body Material: Steel
  • Finish: Blued Steel
  • Made in: USA

This product was added to our catalog on Wednesday 11 March, 2026.

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