Smith & Wesson M&P Magazine Extension by Henning
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.
Factory 17 Round Magazine extension will increase up to 24 + 1 with the optional follower spring kit.
MBX "Ultra Max" Spring & Follower
*Note This Product will not lock slide back on last round fired
ATTENTION!
Before Inserting Magazine Into Firearm
New MBX competition follower & spring sets need to be loaded 4-6 times to capacity preventing follower popping out when new , insuring spring set and the follower sits down in tube when new, this avoids any slide contact and damange to spring and follower voiding warranty as the competition follower is NOT held down by the slide stop and has minimal surface area , the competition follower is designed once spring is set to sit 1/4-3/8 below top of feed lips thus avoiding damaging slide contact with follower once magazine is empty.
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