This basepad is designed by shooters for shooters for the SIG MPX magzine and can add up to 10 rounds in 9mm. These are made from high quality aluminum and hard anodized to provide an ultra durable platform to support the MPX magazines. Our extentions are easy to remove and clean. Whether it is for duty use, competition, or recreation, this is a great addition to your MPX.
***DO NOT USE THE BOTTOM PLATE ON YOUR MAGAZINE SPRING.***