Sig Sauer P320/P250 21-Round 9mm Extended Magazine - Blued Steel

The Sig Sauer MAGMODF921 delivers 21 rounds of 9mm capacity in a factory-engineered extended magazine for P320 and P250 pistols. This blued steel construction magazine provides reliable feeding and increased ammunition capacity for competitive shooting, duty applications, and extended range sessions.

What Makes This Different

This extended magazine adds 4 additional rounds over standard 17-round P320 magazines while maintaining the same reliable feeding geometry. The blued steel construction offers superior durability compared to polymer alternatives, with witness holes for quick round counting. Factory engineering ensures proper spring tension and follower geometry for consistent feeding across all 21 rounds.

Key Features

• 21-round capacity increases firepower by 4 rounds over standard magazines
• Blued steel construction provides enhanced durability and corrosion resistance
• Compatible with both P320 and P250 pistol platforms in 9mm Luger
• Witness holes allow quick visual ammunition count verification
• Factory-engineered spring and follower system ensures reliable feeding
• Extended baseplate provides improved grip surface for tactical reloads
• Drop-free design enables fast magazine changes under stress

Competitive shooters benefit from the extended capacity during USPSA Production division matches, while law enforcement officers gain additional rounds for duty carry. The steel construction withstands repeated loading cycles and harsh environmental conditions better than polymer magazines. Range training becomes more efficient with fewer reloads required during drills and practice sessions.

Technical Specs

• Capacity: 21 rounds of 9mm Luger ammunition
• Construction: Blued carbon steel body with steel spring
• Compatibility: Sig Sauer P320 and P250 pistols (9mm only)
• Overall Length: Approximately 6.2 inches
• Weight: 4.8 ounces empty
• Finish: Traditional blued steel coating
• Country of Origin: United States
• Manufacturer Part Number: MAGMODF921

This factory magazine maintains Sig Sauer's quality standards while providing the extended capacity serious shooters demand. The steel construction and proven design deliver consistent performance when additional ammunition capacity matters most.