Home / Accessory-Magazines / Warne M&P 9/40 MAG EXTENSION BLK View cart “FN MAGAZINE FN 509M 9MM 10RD” has been added to your cart. Sale! Warne M&P 9/40 MAG EXTENSION BLK$4999 Original price was: $4999.$4869Current price is: $4869. In stock Warne M&P 9/40 MAG EXTENSION BLK quantity Add to cart SKU: MESW-5/4BLK Category: Accessory-Magazines Product ID: 26021 Description Description +5 9MM | +4 .40 Mag Extension6061 T6 Aluminum BilletType 2 Anodized Finish Related products FN MAGAZINE FN 509 9MM 10RD FDE $5699 Walther Arms MAGAZINE PPQ M1 9MM 15RD $4900 Springfield Armory MAGAZINE XD 40SW 12RD SERV/TAC $3099 Walther Arms MAGAZINE PPK/S 22LR 10RD $3900