Sig Sauer P229 Magazine 12rd 40S&W/357SIG Black Phosphate Steel

The Sig Sauer MAG2294312 P229 magazine delivers reliable feeding and consistent performance for 40 S&W and 357 SIG calibers. This factory-manufactured magazine maintains the same quality standards as the original equipment that ships with new P229 pistols. Black phosphate coating provides enhanced corrosion resistance while the steel construction ensures long-term durability under demanding conditions.

What Makes This Different

Factory Sig Sauer magazines undergo rigorous quality control testing that aftermarket alternatives often skip. The steel body construction resists deformation under pressure better than polymer alternatives. Heat-treated springs maintain consistent tension through thousands of loading cycles. Black phosphate finish offers superior corrosion protection compared to basic bluing or painted surfaces.

Key Features

• 12-round capacity for 40 S&W and 357 SIG cartridges
• Steel magazine body with black phosphate corrosion-resistant coating
• Factory Sig Sauer construction matches original equipment specifications
• Heat-treated magazine spring maintains consistent feeding pressure
• Polymer follower designed for smooth cartridge presentation
• Compatible with all Sig Sauer P229 pistol variants
• Witness holes allow quick visual capacity assessment

This magazine performs consistently across temperature extremes and environmental conditions. Law enforcement agencies rely on these magazines for duty carry where failure is not an option. Competition shooters appreciate the reliable feeding that prevents costly match delays. The steel construction handles repeated drops and impacts without cracking that can plague polymer magazines.

Technical Specs

• Capacity: 12 rounds
• Caliber: 40 S&W and 357 SIG
• Construction: Steel body with polymer follower
• Finish: Black phosphate coating
• Compatibility: Sig Sauer P229 pistols (all variants)
• Spring: Heat-treated steel
• Country of Origin: USA
• Model Number: MAG2294312

Factory magazines eliminate compatibility concerns and feeding issues that plague many aftermarket options. Professional armorers recommend staying with original equipment magazines for critical applications. This magazine ships ready to use with no break-in period required.