Blueline Magazine Extension +3 - Black

Blueline Magazine Extension +3 Smith & Wesson M&P 9/40
Item: H134-MS-BLK  Back Ordered
Expected Delivery Date: 6/6/2025
  Manufacturer: Henning
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Blueline Magazine Extension +3

Smith & Wesson M&P 9/40


Designed in collaboration with a current SWAT Operator and US Army Veteran, our Magazine Extensions offer:           


Confident magazine indexing through our patent pending design.

Improved grip support for shooters with larger hands.

Basepad allows for an effortless strip with the knife-edge of the support hand on malfunctions or stuck magazines.

Designed by a door-kicker, for door-kickers.


The kit comes with the magazine extension only, through extensive testing we have found a longer spring unnecessary. 


U.S. Patent 9,772,151


Our Blueline magazine extensions are on the Mesa Police Department Authorized Firearms List.


DOES NOT WORK WITH THE FACTORY MAGWELL FOUND ON THE M&P COMPETITIOR.


Our Blueline magazine extensions are on the Authorized Firearms List for Mesa Police Department.

Our Blueline magazine extensions are on the Authorized Firearms List for Mesa Police Department.


  • Manufacturer: Henning
  • Shipping Weight: 0.1 lbs
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