ProMag SMIA21 12rd .22 LR Magazine – Black Oxide

This ProMag SMIA21 magazine is a 12-round replacement magazine intended for use with Smith & Wesson M&P22 Compact .22 LR pistols. Construction uses heat-treated steel with a black oxide finish and an injection-molded follower to support reliable cycling during range use and training.
The magazine includes a spring formed from heat-treated chrome silicone wire and is manufactured in the USA. It is not compatible with Smith & Wesson M&P 9mm, M&P Shield, M&P Shield Plus, or Shield EZ pistols.

Key Specifications

• Holds 12 rounds.
• Caliber: .22 LR.
• Designed to fit Smith & Wesson M&P22 Compact .22 LR series pistols.
• Does not fit Smith & Wesson M&P 9mm, M&P Shield, M&P Shield Plus, or Shield EZ pistols.
• Magazine body constructed from heat treated steel with black oxide finish.
• Features an injection molded magazine follower.
• Spring formed from heat treated chrome silicone wire.
• Manufactured in the USA.
• Weight listed as 0.65 (manufacturer data).

Robustly built for consistent function during repetitive use, this ProMag SMIA21 magazine offers a straightforward replacement option for owners of the M&P22 Compact. Its heat-treated steel construction and purpose-built spring/follower combination prioritize durability and reliable feeding for range sessions and practice. For users seeking a factory-style spare or serviceable aftermarket magazine, the SMIA21 provides a dependable component backed by U.S. manufacture.