ProMag SIGA20 StandardBlued Steel Detachable 21rd for 9mm Luger Sig P320PromagPrice from $20.85 to $23.63.
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Promag
The Promag Sig P320 9mm magazine gives you serious firepower in a reliable, affordable package. Built for Sig Sauer P320 pistols, this 21-round magazine delivers the capacity you want for training, competition, or duty use without breaking the bank. Promag has earned its reputation by keeping production in the USA and standing behind every magazine with a lifetime guarantee—that's the kind of confidence that matters when you're relying on your gear in the field or at the range.
What sets this magazine apart is the attention to engineering details. The magazine body is heat-treated steel with a black oxide finish, proven to resist corrosion and handle hard use. The magazine follower is injection molded for consistent feeding, and the spring is formed from heat-treated chrome silicon wire—the same material precision tooling shops rely on for strength and repeatability. Every magazine goes through multiple quality checks during assembly, so you're not guessing whether it'll work when you need it.
The Flat Dark Earth endplate is a practical touch if you're running that color scheme on your P320, and it breaks up the all-black profile. Whether you're building a range gun, outfitting a duty pistol, or just want reliable backup magazines that don't ask you to choose between performance and cost, Promag's proven track record and US manufacturing make this a solid choice that'll stay in your lineup for years.
| Caliber | 9mm |
| Capacity | 21 rounds |
| Fit | Sig Sauer P320 |
| Magazine Body | Heat-treated steel with black oxide finish |
| Endplate | Flat Dark Earth |
| Follower | Injection molded |
| Spring Material | Heat-treated chrome silicon wire |
| Warranty | Lifetime guarantee against manufacturer's defects |
| Manufacture | USA |
Yes. This Promag magazine is specifically designed for the Sig Sauer P320 9mm pistol.
You're getting a single 21-round magazine with the heat-treated steel body, Flat Dark Earth endplate, and assembled spring and follower ready to load and use.
Yes. Promag manufactures this magazine in the USA and backs it with a lifetime guarantee against manufacturer's defects.
Heat-treated chrome silicon wire is precision-wound to maintain consistent tension and feeding reliability over thousands of cycles. It's the same material used in high-demand industrial and firearms applications where failure isn't an option.
Promag
The Promag Sig P320 9mm magazine gives you serious firepower in a reliable, affordable package. Built for Sig Sauer P320 pistols, this 21-round magazine delivers the capacity you want for training, competition, or duty use without breaking the bank. Promag has earned its reputation by keeping production in the USA and standing behind every magazine with a lifetime guarantee—that's the kind of confidence that matters when you're relying on your gear in the field or at the range.
What sets this magazine apart is the attention to engineering details. The magazine body is heat-treated steel with a black oxide finish, proven to resist corrosion and handle hard use. The magazine follower is injection molded for consistent feeding, and the spring is formed from heat-treated chrome silicon wire—the same material precision tooling shops rely on for strength and repeatability. Every magazine goes through multiple quality checks during assembly, so you're not guessing whether it'll work when you need it.
The Flat Dark Earth endplate is a practical touch if you're running that color scheme on your P320, and it breaks up the all-black profile. Whether you're building a range gun, outfitting a duty pistol, or just want reliable backup magazines that don't ask you to choose between performance and cost, Promag's proven track record and US manufacturing make this a solid choice that'll stay in your lineup for years.
| Caliber | 9mm |
| Capacity | 21 rounds |
| Fit | Sig Sauer P320 |
| Magazine Body | Heat-treated steel with black oxide finish |
| Endplate | Flat Dark Earth |
| Follower | Injection molded |
| Spring Material | Heat-treated chrome silicon wire |
| Warranty | Lifetime guarantee against manufacturer's defects |
| Manufacture | USA |
Yes. This Promag magazine is specifically designed for the Sig Sauer P320 9mm pistol.
You're getting a single 21-round magazine with the heat-treated steel body, Flat Dark Earth endplate, and assembled spring and follower ready to load and use.
Yes. Promag manufactures this magazine in the USA and backs it with a lifetime guarantee against manufacturer's defects.
Heat-treated chrome silicon wire is precision-wound to maintain consistent tension and feeding reliability over thousands of cycles. It's the same material used in high-demand industrial and firearms applications where failure isn't an option.
