The Sig Sauer MAG-20-224-312 SP2022 magazine delivers reliable feeding and consistent performance for 40 S&W and 357 SIG chambered firearms. This 12-round magazine features blued steel construction that resists corrosion while maintaining the precise tolerances required for flawless operation. Compatible with multiple Sig Sauer platforms including the SP2022, Pro 2340, and 2009 models.
What Makes This Different
Unlike polymer alternatives, this magazine utilizes heat-treated steel construction that maintains dimensional stability under repeated use and temperature variations. The blued finish provides superior corrosion resistance compared to standard phosphate coatings. Internal components feature precise machining tolerances that ensure consistent cartridge positioning and reliable feeding geometry across thousands of loading cycles.
Key Features
- 12-round capacity for 40 S&W and 357 SIG cartridges
- Heat-treated blued steel body resists deformation and wear
- Compatible with Sig Pro 2340, SP2022, and 2009 pistols
- Factory-engineered spring tension for consistent feeding
- Witness holes allow visual ammunition count verification
- Drop-free design enables rapid tactical reloads
- Polymer follower reduces friction and binding
Field testing demonstrates consistent feeding across various ammunition weights and profiles, from 155-grain to 180-grain projectiles in 40 S&W configurations. The magazine maintains functionality in temperature ranges from -20°F to 140°F, making it suitable for law enforcement duty use, competitive shooting, and personal defense applications. The steel construction withstands repeated drops onto concrete surfaces without compromising feed reliability.
Technical Specs
- Capacity: 12 rounds
- Caliber Compatibility: 40 S&W, 357 SIG
- Material: Heat-treated blued steel body
- Compatible Models: Sig Pro 2340, SP2022, 2009
- Follower: High-impact polymer
- Spring: Music wire construction
- Weight: 3.2 ounces (empty)
- Manufacturer: Sig Sauer
- Country of Origin: USA
This magazine represents factory-quality construction at OEM specifications, ensuring compatibility and reliability that aftermarket alternatives often cannot match. The steel construction provides longevity that justifies the investment for serious shooters who demand consistent performance.