The ProMag Steel Magazine Smith & Wesson M&P40 .40 S&W Blued 10 rd. is an exceptional accessory for firearm enthusiasts who prioritize reliability and performance. Specifically designed for the Smith & Wesson M&P40 series, this 10-round magazine accommodates the .40 S&W caliber, making it an indispensable addition to your M&P40 pistol. Crafted from heat-treated blued steel, the ProMag SMI 22 offers remarkable durability and longevity, while its double-stack design maximizes capacity without sacrificing size. The magazine is equipped with a follower lock-plate and base-plate made from a proprietary DuPont Zytel-based black polymer, enhancing its resilience and functionality. Featuring a meticulously wound and heat-treated chrome-silicon spring, this magazine ensures consistent feeding and dependable performance, even in challenging conditions. Proudly made in the USA, it reflects quality craftsmanship and attention to detail, making it a reliable companion for both professional and recreational shooters. Whether at the range or in the field, the ProMag Smith & Wesson M&P40 magazine guarantees seamless operation and peace of mind. With its robust construction and thoughtful design, this magazine is not merely an accessory but a vital component of your shooting gear, ensuring that your M&P40 pistol operates at its best. The ProMag Steel Magazine stands as a testament to excellence and reliability, backed by a brand renowned for its commitment to quality and innovation in the firearms industry.