Glock 43X / 48 Magazine – S15 Gen 3 +5 Pre-Installed 20 Round – Black

Shield Arms

Was: $74.99
Now: $69.99

Glock 43X / 48 Magazine – S15 Gen 3 +5 Pre-Installed 20 Round – Black


PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.

The Shield Arms S15 Gen 3 +5 Pre-Installed magazine is a complete 20 round Glock 43X / 48 magazine setup built around the S15 Gen 3 steel body and a factory-installed aluminum +5 extension. It ships assembled and tested, which saves the buyer from fiddling with springs, extension install, and the usual garage-bench guessing game.

This is not the flush carry mag. This is the higher-capacity setup for range work, training, reloads, and anyone who wants the extended format ready to go out of the box.


Fitment

  • Fits Glock 43X
  • Fits Glock 48
  • 9mm platform
  • S15 Gen 3 magazine system

Does NOT fit

  • Does not fit Glock 43
  • Does not fit double-stack Glock models
  • Not intended for use with the OEM polymer magazine catch

What it does

This setup gives the Glock 43X / 48 platform a ready-to-run 20 round magazine using an S15 Gen 3 mag body and pre-installed +5 extension. The big practical benefit is that the assembly is already done and tested by the manufacturer, so the buyer gets the extended-capacity format without handling installation.


Why it’s worth it

This one makes sense for shooters who want the extra capacity but do not care to build the extension setup themselves. It is a strong choice for range work, spare-mag duty, or competition-minded setups where added length is acceptable and extra rounds are the point.


Specs

  • Manufacturer: Shield Arms
  • Product line: S15 Gen 3 +5 Pre-Installed
  • Platform: Glock 43X / Glock 48
  • Caliber: 9mm
  • Total capacity: 20 Round
  • Base system: S15 Gen 3 steel magazine
  • Extension: Pre-installed +5 aluminum extension
  • Color: Black
  • Made in USA

What’s included

  • 1 complete 20 Round pre-installed magazine assembly

Tools needed

None for installation because the extension is factory installed. You still need enough sense to test it before betting your life on it.


Install notes

Use the correct Shield Arms steel mag catch with S15-based magazines. Check insertion, retention, slide lock, and live-fire reliability in your pistol before serious use.


Verify before you buy

Verify your pistol is a Glock 43X or 48. Verify you want the complete pre-installed 20 round magazine and not a flush-fit 15 round mag or a separate extension kit.


⚠ Glock Disclaimer

IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by Glock, Inc. or Glock Ges.m.b.H.

All references to GLOCK® are used solely to identify firearm models, parts compatibility, and fitment information for customers. Glock is a federally registered trademark of Glock, Inc. and Glock Ges.m.b.H.

Any product sold on this site referencing Glock is aftermarket, not OEM, and is not manufactured by Glock. Glock does not warranty, authorize, or guarantee the performance, safety, or reliability of any third-party components or modifications.

Firearm parts should be installed by a qualified armorer or gunsmith. Improper installation, modification, or use of aftermarket components may affect firearm safety, reliability, and void manufacturer warranties. By purchasing and installing third-party parts, the buyer assumes all responsibility for safe handling, installation, function testing, and use of their firearm and accessories.

Buyer is responsible for compliance with all local/state laws regarding magazine capacity.


⚠️ LEGAL DISCLAIMER

Don’t be that guy ordering 30-round mags in ban states. We don’t ship to restricted zones unless you’ve got the paperwork and Odin’s blessing. You’ve been warned.

Note on Shipping

⚠️ High-capacity magazine laws suck, and unfortunately this item cannot ship to CA, CO, CT, DC, HI, IL, MA, MD, NJ, NY, RI, WA, VT, or other restricted states. Adult signature required where applicable.