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Henning Group's Magazine Extension for Smith & Wesson M&P 9mm. This extension is made to make your magazine legal for USPSA 141.25mm gauge. For maximum capacity, add the follower kit.
Our latest design includes numbering dots, serrations for light side grab and a reinforced wall thickness.
Note! This will not work in the M&P Competitor with magwell
Our latest design includes numbering dots, serrations for light side grab and a reinforced wall thickness.
Note! This will not work in the M&P Competitor with magwell
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