Features:

• 20-round magazine
• Fits Smith & Wesson M&P 10mm series pistols
• Does not fit Smith & Wesson M&P 9mm M&P Shield® 9mm M&P Shield Plus 9mm Shield EZ 9mm pistols
• Magazine body constructed of heat treated steel with black oxide finish
• Injection molded magazine follower
• Magazine spring formed from heat treated chrome silicone wire 
• Made in USA