Home / Accessory-Magazines / Beretta MAGAZINE PX4 40S&W 17RD EXTEND View cart “Warne M&P 9/40 MAG EXTENSION FDE” has been added to your cart. Sale! Beretta MAGAZINE PX4 40S&W 17RD EXTEND$5200 $4705 Out of stock SKU: JM4PX4017 Category: Accessory-Magazines Product ID: 33568 Description Description 17rd. Mag for PX4 Storm 40S&WExtended PX4 Mag Related products Springfield Armory MAGAZINE XD-S 40SW 6RD $3099 Walther Arms MAGAZINE PPQ M2 45ACP 12RD $4900 Sale! Warne M&P 9/40 MAG EXTENSION FDE $5499 $5237 Sale! Ruger SECURITY9 COMPACT MAG 9MM 10RD $4295 $4191