Trusted by experienced shooters across the country, the ProMag® Ruger® SR40 .40 S&W 15-Round Magazine is a durable aftermarket pistol magazine, engineered to deliver factory-like field service at a low, budget-friendly price. Featuring a heat-treated steel tube for exceptional strength and reliability, this ultrareliable pistol magazine comes equipped with a chrome silicon spring and impact-resistant polymer follower for smooth feeding performance and consistent operation, while the removable polymer floor plate offers quick disassembly for reliable cleaning and maintenance when required. As Ruger’s first striker-fired pistol, the SR series combines concealability, controllability, and firepower at a value that’s tough to beat. Designed to meet the needs of law enforcement and ideal for civilian carry, the SR40 is a force to be reckoned with. Better yet, this ProMag magazine is backed by ProMag's legendary lifetime warranty, promising superior quality and lasting service you can depend on. Backed by ProMag's legendary lifetime warranty. Made in USA.