ProMag FN Five-seveN USG Drum Handgun Magazine 5.7x28mm 55rd

Features: 55-round drum magazine Fits FN Five-seveN USG 5.7x28mm pistol Magazine body constructed of a proprietary DuPont Zytel based polymer Blue steel upper magazine tower Injection molded magazine follower Magazine spring formed from heat treated stainless steel Made in USA