Wilson Combat has been supplying serious shooters and professionals with the worlds' most reliable and durable 1911 magazines for the past 30 years. They are used by the worlds' most Elite U.S. Army SPEC OPS unit "FBI SWAT" Thunder Ranch and professionals worldwide. NO other magazine on the market can compare for proven inherent reliability, durability and the ability to remain fully loaded for long periods of time without damage. Features: Superb feeding Increases reliability in 1911 pistols 0.025 inches tube walls Stainless steel