Promag Smith & Wesson SD40 Handgun Magazine .40 S&W 50/rd

Features:

• 50-round drum magazine
• Fits Smith & Wesson SD40 .40 S&W pistol
• Magazine body constructed of a proprietary DuPont Zytel based polymer
• Hybrid steel upper magazine tower
• Injection molded magazine follower
• Magazine spring formed from heat treated stainless steel 
• Made in USA