ProMag SMIA21 12rd .22 LR Magazine — S&W M&P22 Compact

The ProMag SMIA21 is a 12-round replacement magazine specified for use with Smith & Wesson M&P22 Compact .22 LR pistols. Constructed with a heat-treated steel body and finished in black oxide, it is built for routine range use and training. The magazine features an injection-molded follower and a spring formed from heat-treated chrome silicone wire. This component is made in the USA and provides a direct-fit option where compatible.

Key Specifications

• The magazine holds 12 rounds.
• The magazine is designed for .22 LR.
• Compatibility is listed as Smith & Wesson M&P22 Compact pistols.
• The magazine body is constructed of heat treated steel.
• The exterior finish is black oxide.
• The follower is an injection molded magazine follower.
• The spring is formed from heat treated chrome silicone wire.
• Origin is listed as Made in USA.
• Listed weight is 0.65 (unit not specified by source).

Durable construction and OEM-fit compatibility make the SMIA21 a practical spare or replacement magazine for range sessions and training. Its straightforward design emphasizes reliable feeding and simple maintenance so you can keep focus on practice and marksmanship development.