This is the ProMag Smith & Wesson CSX 9mm 32-round extended magazine. 

Maximizing your CSX’s firepower is easy with this extended 32-round magazine from ProMag!

It delivers superior durability and reliability thanks to its heat-treated steel construction and anti-tilt polymer follower. It even has a corrosion-resistant blued finish that helps mitigate scratches and rust. 

You’ll find side-facing witness holes to give you an idea of when it’s coming close to time to reload, and best of all, these are made right here in the USA! You probably won’t be able to use these magazines for concealed carry (more power to you if you can), but they are perfect for training and range time.  

Despite their high capacity, it can’t hurt to grab a couple! Add some to your cart before continuing your shopping!