
Availability: In Stock
The Promag Sig P365 9mm 20-round magazine is a high-capacity steel magazine purpose-built for the compact Sig Sauer P365 platform. If you run a P365 for carry, home defense, or range work, this blue steel magazine lets you load significantly more rounds than factory standard, extending your shooting session between reloads without changing firearms.
Promag specializes in aftermarket magazine solutions for popular handguns, and this P365 magazine maintains reliable feed and function across standard 9mm ammunition. The 20-round capacity represents a substantial upgrade from the compact nature of the P365 itself, making it a practical option for shooters who want extra rounds on board for training, competition, or defensive readiness.
Blue steel construction is durable field-proven design—straightforward, corrosion-resistant, and built to handle regular use. Whether you're stocking spares for your range bag or looking to maximize capacity without adding another firearm to your rotation, this magazine fits the bill for P365 owners who want more rounds downrange.
| Brand | Pro Mag |
| Firearm Compatibility | Sig Sauer P365 |
| Caliber | 9mm |
| Capacity | 20 rounds |
| Material | Blue steel |
Yes—this magazine is designed specifically for the Sig Sauer P365 in 9mm.
This Promag aftermarket option provides 20-round capacity, allowing you to load significantly more ammunition than standard P365 magazines without changing guns.
The 20-round capacity makes this magazine better suited to range training, competition, or home defense use rather than everyday concealed carry, where standard or extended factory magazines are typically preferred.


SKU: 115762459 • Weight: 0.25oz





Availability: In Stock
The Promag Sig P365 9mm 20-round magazine is a high-capacity steel magazine purpose-built for the compact Sig Sauer P365 platform. If you run a P365 for carry, home defense, or range work, this blue steel magazine lets you load significantly more rounds than factory standard, extending your shooting session between reloads without changing firearms.
Promag specializes in aftermarket magazine solutions for popular handguns, and this P365 magazine maintains reliable feed and function across standard 9mm ammunition. The 20-round capacity represents a substantial upgrade from the compact nature of the P365 itself, making it a practical option for shooters who want extra rounds on board for training, competition, or defensive readiness.
Blue steel construction is durable field-proven design—straightforward, corrosion-resistant, and built to handle regular use. Whether you're stocking spares for your range bag or looking to maximize capacity without adding another firearm to your rotation, this magazine fits the bill for P365 owners who want more rounds downrange.
| Brand | Pro Mag |
| Firearm Compatibility | Sig Sauer P365 |
| Caliber | 9mm |
| Capacity | 20 rounds |
| Material | Blue steel |
Yes—this magazine is designed specifically for the Sig Sauer P365 in 9mm.
This Promag aftermarket option provides 20-round capacity, allowing you to load significantly more ammunition than standard P365 magazines without changing guns.
The 20-round capacity makes this magazine better suited to range training, competition, or home defense use rather than everyday concealed carry, where standard or extended factory magazines are typically preferred.
SKU: 115762459 • Weight: 0.25oz

