1. Capacity: 15 rounds of 9mm (a 50% increase over the factory 10-round OEM magazine while retaining the same flush-fit length). 
2. Construction: Heat-treated steel body with a QPQ Nitrocarburized or Electroless/Black Nickel finish options.
3. Geometry: Patented staggered-round arrangement with an anti-tilt polymer follower and performance spring. 
4. Mag Catch Requirement: Requires swapping the factory polymer magazine catch to a Shield Arms Steel Mag Catch; OEM plastic magazines will not function properly once the steel catch is installed. 
5. Warranty: 100% lifetime warranty and a "Spring for Life" free replacement spring guarantee from the factory. 
 
I also have the Shield Arms Steel Mag Catch for sale.