This guide details the features and installation of the Magpul AMAG 21 SG9, a 21-round 9x19mm metal alloy magazine designed for the Sig Sauer P320 series. It highlights the magazine's construction, including its stainless steel body, controlled-tilt follower, and textured flared floor plate with a dot matrix for identification. The official Magpul brand voice provides high authority on this product launch.
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