The Magpul AMAG 21 SG9 is a 21-round magazine designed for use with the Sig Sauer P320 in 9mm. It combines a stainless-steel body with polymer sub-components for a balance of durability and weight savings. Magpul’s design includes a high-visibility controlled-tilt follower and a stainless-steel spring for reliable feeding. The magazine also incorporates maintenance-friendly features such as a removable flared floorplate and capacity indicator windows.
Key Specifications
- The capacity is 21 rounds.
- The cartridge caliber is 9mm.
- Designed to fit Sig Sauer P320 pistols.
- The body material is stainless steel with polymer sub-components.
- The spring is made of stainless steel for corrosion resistance.
- Includes a high-visibility, controlled-tilt follower for reliable feeding.
- Features a removable flared floorplate to simplify cleaning and maintenance.
- Includes capacity-indicator windows starting at five rounds and marked in single-round increments.
- Finish/appearance is silver and black (stainless body with black polymer components).
- Sold as a single magazine (quantity 1).
Durable materials and practical maintenance features make the AMAG 21 SG9 a sensible spare or replacement magazine for range work, training, and routine carry setups where extended capacity and clear round-count visibility matter. Its stainless-steel construction and polymer components deliver a balance of longevity and function while the removable floorplate and indicator windows keep upkeep straightforward.
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