The ProMag FN Five-seveN USG drum handgun magazine is designed for FN Five-seveN IOM and USG pistols chambered in 5.7x28mm. It has a 55-round capacity and combines a polymer magazine body with a blue steel upper magazine tower.

Key Specifications

• The magazine holds 55 rounds.
• It is chambered for 5.7x28mm.
• The magazine fits FN Five-seveN IOM and USG pistols.
• The body is made from a proprietary DuPont Zytel-based polymer.
• The upper magazine tower is constructed from blue steel.
• The follower is injection molded.
• The magazine spring is formed from heat-treated stainless steel.
• The listed finish is black.
• The magazine is intended for a centerfire pistol.
• This product is made in the USA.

With its high-capacity drum format and stated compatibility with FN Five-seveN IOM and USG pistols, this ProMag magazine provides a purpose-built option for range sessions and organized training. Its polymer construction, steel tower, and stainless steel spring reflect a practical design focused on fit and function.