The ProMag SIGA20 extends your Sig Sauer P320's capacity to 21 rounds of 9mm Luger ammunition, providing tactical advantages for competitive shooting and extended range sessions. This aftermarket magazine features blued steel construction for enhanced durability compared to polymer alternatives.
What Makes This Different
The SIGA20 offers 50% more capacity than standard P320 magazines while maintaining the same grip profile and handling characteristics. The blued steel construction provides superior feed lip integrity under repeated loading cycles compared to polymer magazines. Heat-treated steel components resist deformation from magazine springs under compression, ensuring consistent feeding over thousands of rounds.Key Features
- 21-round capacity increases firepower without grip extension
- Blued carbon steel body resists corrosion and impact damage
- Heat-treated steel feed lips maintain proper cartridge presentation
- Compatible with all Sig Sauer P320 variants and caliber conversions
- Standard magazine catch engagement for reliable lock-up
- Removable floor plate allows disassembly for cleaning
- Anti-tilt follower design prevents double-feeds and misfeeds
Technical Specs
- Capacity: 21 rounds of 9mm Luger ammunition
- Construction: Blued carbon steel body with steel internals
- Compatibility: All Sig Sauer P320 pistol variants
- Overall Length: Approximately 5.2 inches
- Weight: 4.8 ounces empty
- Follower: Anti-tilt polymer design
- Spring: Heat-treated steel with consistent tension
- Manufacturer: ProMag Industries
