PROMAG SIG SAUER P320 MAGAZINE - 9MM - 10 ROUND CAPACITY - 20 ROUND BODY - STEEL - BLUED
ProMag Industries
$35.69 - $39.69
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ProMag Industries
PROMAG SIG SAUER P320 MAGAZINE - 9MM - 10 ROUND CAPACITY - 20 ROUND BODY - STEEL - BLUED
The ProMag Sig Sauer P320 9mm Magazine delivers reliable, California-compliant 10-round capacity in a full-size 20-round steel body — purpose-built for P320 owners who demand American-made quality and lasting durability.
- California-compliant 10-round capacity housed in a 20-round steel body
- Heat-treated steel construction with a tough black oxide blued finish
- Precision-wound chrome silicon wire spring for consistent feed pressure
- Injection-molded follower ensures smooth, reliable round advancement
- Drop-in fit for Sig Sauer P320 9mm pistols — no modifications required
- Made in the U.S.A. and backed by a lifetime manufacturer's defect guarantee
Who This Is For
This magazine is ideal for California-based Sig Sauer P320 owners who want a compliant, high-quality replacement or spare magazine. Whether you're a competitive shooter, a range enthusiast, or a responsible home defender, ProMag's steel construction and rigorous quality control make this a dependable choice for everyday use.
Specifications
| Brand | ProMag Industries |
|---|---|
| Fits | Sig Sauer P320 |
| Caliber | 9mm |
| Legal Capacity | 10 Rounds (CA Compliant) |
| Magazine Body | 20-Round Profile |
| Material | Heat-Treated Steel |
| Finish | Black Oxide (Blued) |
| Follower | Injection-Molded Polymer |
| Spring | Heat-Treated Chrome Silicon Wire |
| Country of Origin | U.S.A. |
| Warranty | Lifetime (Manufacturer Defects) |
Frequently Asked Questions
Will this magazine fit all Sig Sauer P320 variants?
This ProMag magazine is designed specifically for the Sig Sauer P320 chambered in 9mm. It is compatible with standard full-size and compact P320 frames that accept the 9mm format. If you have an X-Series or subcompact variant, verify baseplate and grip module clearance before purchasing, as fitment can vary across frame sizes.
Why does this magazine have a 20-round body but only hold 10 rounds?
California law restricts magazine capacity to 10 rounds. This magazine uses a full-size 20-round steel body that has been permanently blocked to hold a maximum of 10 rounds, making it legal for sale and possession in California while retaining the ergonomics and grip extension of a standard-capacity magazine.
How does ProMag ensure feeding reliability in their magazines?
ProMag uses a multi-step quality control process during assembly, combining a precision-wound chrome silicon wire spring — which maintains consistent tension over thousands of cycles — with an injection-molded follower designed to guide rounds smoothly into the chamber. The heat-treated steel body resists deformation under repeated use, helping to maintain reliable feeding and ejection over the life of the magazine.
- Caliber:
- 9mm
- Capacity:
- 10/20 Round
- Color:
- Blued
- Follower Color:
- Black
- Type:
- Pistol Magazine
- CA Compliant:
- Yes
- Platform:
- P320
- Material:
- Steel
