ProMag continues to manufacture new and exciting products for a wide range of firearm platforms. Their aftermarket magazines are an excellent alternative to expensive factory units when you need a spare or wish to enhance your range experience.  This 9 round mag is designed to fit the Smith & Wesson M&P Shield handgun chambered in .40 S&W. Its steel body is heat treated before receiving a black oxide finish for optimal strength and durability. Internally the polymer follower is paired with a heat-treated chrome silicon wire spring to ensure reliable function over a long service life. No need to treat these with kid gloves, ProMag's .40 Shield magazines are capable of withstanding the rigors commonly associated with intense training sessions. As an extended mag, each unit includes a polymer sleeve that rides above the baseplate to fill the gap created under the grip. Unlike some aftermarket magazines, all ProMags come with a lifetime warranty against manufacturer's defects so you can shoot with confidence knowing they have your back.

Features and Specifications:
Manufacturer Number: SMI 31
Fits: Smith & Wesson M&P Shield
Caliber: .40 S&W
Capacity: 9 Rounds
Body: Heat Treated Steel
Follower: Polymer
Spring: Heat Treated Chrome Silicon Wire
Baseplate: Polymer
Magazine Sleeve: Polymer
Finish: Black Oxide
Made in USA