Promag Standard 15rd Extended Magazine for Sig P229 in .40 S&W and .357 Sig delivers reliable performance and increased capacity for your Sig Sauer P229. Expertly crafted with heat-treated blued steel this extended mag offers durability you can trust. Equipped with an injection-molded follower and a chrome silicone wire spring for smooth feeding it's designed for precision and longevity. Made in the USA this magazine is perfect as a replacement or spare combining functionality quality and craftsmanship. Its oxide finish ensures sleek aesthetics and corrosion resistance. Upgrade your carry with this 15-round extended capacity magazine built to keep up with every shot.