$23.59
Availability: In Stock
The ProMag SIGA20 is a 21-round blued steel magazine designed for the Sig Sauer P320 in 9mm Luger, built for shooters who want reliable capacity without compromise. Whether you're running drills at the range, training for defensive scenarios, or simply want spares that go the distance, this magazine delivers the round count and durability you need from a trusted domestic manufacturer. ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer defects—a solid assurance for gear you rely on.
The SIGA20 uses precision-wound, heat-treated chrome silicon wire springs throughout its assembly, engineered to handle repeated loading cycles without degradation. Every magazine is inspected multiple times during production to ensure consistent quality control, so you're getting the same level of reliability in round one and round 200. The blued steel construction is rugged enough for hard use, and the straightforward design makes loading fast and intuitive.
If you run a P320 in 9mm, having a few high-capacity mags on hand opens up longer training sessions and gives you flexibility in how you configure your setup. At 21 rounds, the SIGA20 gives you more shooting between reloads without the size penalty of some extended designs.
| Caliber | 9mm Luger |
| Capacity | 21 rounds |
| Fit | Sig Sauer P320 |
| Material | Blued steel |
| Spring | Heat-treated chrome silicon wire |
| Manufacture | USA |
| Warranty | Lifetime guarantee against manufacturer defects |
Yes, the SIGA20 is designed specifically for the Sig Sauer P320 chambered in 9mm Luger.
The SIGA20 holds 21 rounds of 9mm Luger ammunition.
Yes, ProMag manufactures and assembles all SIGA20 magazines in the USA, and backs them with a lifetime guarantee against manufacturer defects.
The magazine uses a precision-wound spring made from heat-treated chrome silicon wire, designed to maintain consistent feeding through repeated use without degradation.
SKU: 115646867 • Weight: 1oz
Availability: In Stock
The ProMag SIGA20 is a 21-round blued steel magazine designed for the Sig Sauer P320 in 9mm Luger, built for shooters who want reliable capacity without compromise. Whether you're running drills at the range, training for defensive scenarios, or simply want spares that go the distance, this magazine delivers the round count and durability you need from a trusted domestic manufacturer. ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer defects—a solid assurance for gear you rely on.
The SIGA20 uses precision-wound, heat-treated chrome silicon wire springs throughout its assembly, engineered to handle repeated loading cycles without degradation. Every magazine is inspected multiple times during production to ensure consistent quality control, so you're getting the same level of reliability in round one and round 200. The blued steel construction is rugged enough for hard use, and the straightforward design makes loading fast and intuitive.
If you run a P320 in 9mm, having a few high-capacity mags on hand opens up longer training sessions and gives you flexibility in how you configure your setup. At 21 rounds, the SIGA20 gives you more shooting between reloads without the size penalty of some extended designs.
| Caliber | 9mm Luger |
| Capacity | 21 rounds |
| Fit | Sig Sauer P320 |
| Material | Blued steel |
| Spring | Heat-treated chrome silicon wire |
| Manufacture | USA |
| Warranty | Lifetime guarantee against manufacturer defects |
Yes, the SIGA20 is designed specifically for the Sig Sauer P320 chambered in 9mm Luger.
The SIGA20 holds 21 rounds of 9mm Luger ammunition.
Yes, ProMag manufactures and assembles all SIGA20 magazines in the USA, and backs them with a lifetime guarantee against manufacturer defects.
The magazine uses a precision-wound spring made from heat-treated chrome silicon wire, designed to maintain consistent feeding through repeated use without degradation.
SKU: 115646867 • Weight: 1oz