Extra Rounds / More Style! We’ve added some design style to the new Plus Magazine Extensions by GS/Double Diamond. These attractive magazine extensions allow you to add extra rounds – up to 6 extra rounds – to your existing magazines. These combos come pre-installed with an extra power spring to feed the additional rounds consistently every time and are designed with a very innovative system to secure the base plate to the magazine body. The magazine inserts are also designed for a universal fit allowing for custom color combinations and increased style and functionality, available separately here. We encourage you to watch the video for a complete installation demonstration. Available for the following models: G43X/48 – +4 9mm G43 – +2 9mm G17/22/31 – +6 9mm / +5 .40cal/.357 G19/23/32 – +5 9mm / +4 .40cal/.357 G26/27/33 – +5 9mm / +4 .40cal/.357 Big Stick 9mm – +5 9mm Please Note: The Big Stick 9mm Option includes a Glock Factory Big Stick 33rd 9mm Magazine without the Factory +2 Extension, for a total capacity of 36 rounds. Customize your look and style with our interchangeable magazine inserts, available separately here! Extensions are also available separately for full size, compact, and sub-compact models here! Glock 43 extensions can be found here! G43X/48 extensions can be found here!