Glock OEM Plus 2 Mag Extension Kit (9/40/357) Two extra rounds could be the game-changer. The Glock OEM Plus Two Magazine Extension is probably the cheapest most reliable solution to plus up your OEM mags. Includes Mag Insert, fits Gens 1-5, 9MM, 40S&W & 357 SIG double-stack... MSRP: Was: Now: $11.99 OUT OF STOCK
