{"product_id":"warne-mag-ext-s-w-m-p-9-40-5-4-blk","title":"Warne Magazine Extension for S\u0026W M\u0026P 9mm\/40 S\u0026W +5\/+4 Black","description":"\u003cp\u003eThe Warne Magazine Extension increases capacity on factory Smith \u0026amp; Wesson M\u0026amp;P magazines by 5 rounds in 9mm or 4 rounds in 40 S\u0026amp;W. Designed for competitive shooters and range use where extended capacity provides a tactical advantage, this extension maintains reliable feeding while adding extra rounds without requiring a new magazine body.\u003c\/p\u003e\u003cp\u003eMachined from aluminum with a black anodized finish, the extension replaces the factory magazine baseplate with a drop-in installation—no gunsmithing or permanent modifications required. The included extension spring ensures proper magazine function with the added capacity. Note that use of this extension may make the magazine non-compliant in jurisdictions with magazine capacity restrictions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Magazine Extension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e Smith \u0026amp; Wesson M\u0026amp;P 9mm and 40 S\u0026amp;W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity Increase:\u003c\/strong\u003e +5 rounds (9mm), +4 rounds (40 S\u0026amp;W)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-In\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Extension body, extension spring\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Warne","offers":[{"title":"Default Title","offer_id":47940617634047,"sku":"WRM3311","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2888539.jpg?v=1766561135","url":"https:\/\/doublestackstore.com\/products\/warne-mag-ext-s-w-m-p-9-40-5-4-blk","provider":"Double Stack Store","version":"1.0","type":"link"}