USED Shield Arms S15 Gen 3 Combo Glock 43X/48 15 Round 9mm Luger Pistol Magazine 3 Pack Black Steel S15COMBOG33M1C-15RD. The S15 is a steel magazine and is the same length as the OEM Glock 10 round magazine but holds an additional 5 rounds. Modular tooling. Raised ribs on the back of the magazine allows these to fully match the OEM magazine position in the mag well which should eliminate any tolerance stacking that results from Glock frame variations. New steel new coating new heat treat process - new steel is slightly thicker tougher and now comes with a new standard black nitrocarburized QPQ finish for a high degree of corrosion resistance Specifications for Shield Arms S15 Gen 3 Combo Glock 43X/48 15 Round 9mm Luger Pistol Magazine: Manufacturer: Shield Arms Gun Make: Glock Gun Model: Glock 48 Glock 43X Caliber: 9mm Luger Magazine Capacity: 15 Round Color: Black Quantity: 3 Pack Fabric/Material: Stainless Steel Package Contents: Shield Arms S15 Gen 3 Combo Glock 43X/48 15 Round 9mm Luger Pistol Magazine What firearm models does the manufacturer say Shield Arms S15 Gen 3 Combo Glock 43X/48 15 Round 9mm Luger Pistol Magazine is compatible with? The manufacturer suggests that Shield Arms S15 Gen 3 Combo Glock 43X/48 15 Round 9mm Luger Pistol Magazine is compatible with Glock 43X Glock 48Shield Arms S15COMBOG33M1C-15RD: S15 Gen 3 Combo Glock 43X/48 15 Round 9mm Luger Pistol Magazine 3 Pack Black Steel