ProMag SMIA23 S&W M&P 20rd 9mm Blue Steel

The ProMag S&W M&P 9mm 20-round magazine is an affordable aftermarket option designed to fit Smith & Wesson M&P 9mm series pistols. Constructed from heat-treated steel with a black oxide finish, it features an injection-molded follower and chrome silicone spring for reliable feeding. This magazine offers increased capacity over standard factory magazines while maintaining compatibility with full-size M&P 9mm models (excluding Shield variants).