Shield Arms S15 Steel Magazine for Glock 43X/Glock 48 w/ +5 Installed Mag Extension – 20rd capacity


Shield Arms S15 Gen 2 PowerCron 15 round magazine with an installed Shield Arms anodized +5 magazine extension, for a total of 20 rounds.

Out of stock


Increased Capacity, Same Reliability

A brand new Shield Arms S15 Gen 2 PowerCron 15 round 9mm magazine with an anodized Shield Arms +5 magazine extension pre-installed. The unique, easy access floor plate design allows you to quickly access the spring and follower without having to remove the extension from the magazine body. Comes with a 100% lifetime warranty, and the Shield Arms Spring for Life guarantee.

Magazine Specifications

  • 15 round capacity
  • The magazine without the extension is the same length as an OEM Glock 43X/48 magazine
  • Powercron Finish – Powercron is a cationic epoxy coating that offers excellent corrosion resistance and low VOC in a lead-free film electrocoat surface finish.
  • Made in the USA
  • Patent-pending

Magazine Extension Features

  • Increased Capacity, Same Reliability
  • Unique easy access floor plate design to service or clean the magazine body without the need to remove the magazine extension from the magazine body.
  • Index cuts on the extension body to increase grip when coming out of a magazine pouch.
  • Machined from billet 6061 aluminum
  • Type 2 anodized
  • Adds 5 rounds to Shield Arms S15 Gen 2 PowerCron magazine  = 20rd capacity
  • Comes with a 12 coil plus power spring
  • Proudly made in the USA
  • Fits most aftermarket flared mag wells
  • Lifetime warranty
  • UPC: 850029544708

Mag Catch Recommendation

We recommend swapping out your plastic OEM mag catch with a steel mag catchHere’s whyIf you don’t swap your mag catch you may have reliability issuesIf you use another manufacturer’s mag catch you may have reliability issues. Gen 2 magazines were designed to work with Shield Arms steel mag catches.


Like all Shield Arms products, the S15 magazine comes with a 100% lifetime warranty against manufacturing defects. Additionally, Shield Arms offers a Spring for Life Guarantee – wear out your spring, get a new one for free, for life.

Please check your state and local laws regarding magazine capacity restrictions.

Additional information

Weight0.5 lbs