The ATI Schmeisser S50 MLE Glock Pattern 9mm Magazine brings German-engineered quad-stack technology to your Glock-compatible platform delivering a massive 50-round capacity in a complete ready-to-run kit. Developed through ATI's exclusive U.S. import partnership with Schmeisser GmbH - the German manufacturer behind proven high-capacity magazine designs for AR-15 and AK platforms - the S50 MLE adapts that same quad-stack expertise for 9mm Glock-pattern firearms. Built from fiberglass-reinforced polymer with a high-quality stainless steel spring this magazine is engineered for reliable feeding across pistols and pistol caliber carbines (PCC) alike and is rated for full-auto use.ATI Schmeisser S50 MLE Glock Pattern 9mm Magazine - 50 Round (Black Polymer)Fiberglass-reinforced polymer construction with aggressive grip texturing for positive handlingQuad-stack (4-stack) internal design enables 50-round capacity (Glock 17/18) or 48-round capacity (Glock 19 body)Transparent round-count witness windows on the magazine body for at-a-glance capacity checkingHigh-quality stainless steel spring for reliable feeding under sustained and full-auto fireTool-free installation; extension can be removed at any time using the included disassembly toolKit includes disassembly tool and a dedicated magazine loader (load assist device) for ease of loading the quad-stack extensionCompatible with Glock 17 Glock 18 Glock 19 and 9mm Glock-pattern pistol caliber carbines (PCC)The ATI Schmeisser S50 MLE is an ideal high-capacity solution for competition shooters range enthusiasts and PCC users who demand reduced reloads and sustained fire capability. Its full-auto-rated construction and German-engineered internals make it equally suited for Glock 17 and Glock 18 platforms at 50 rounds or Glock 19 setups at 48 rounds. Please note: This magazine is not manufactured authorized endorsed or warranted by GLOCK. Due to its 50-round capacity this product is subject to high-capacity magazine restrictions and cannot be shipped to California Colorado Connecticut Delaware District of Columbia Hawaii Illinois Maryland Massachusetts New Jersey New York Rhode Island Vermont or Washington. Law Enforcement and Active Duty Military may qualify for exemptions - contact us for details.