Shield Arms has launched a plus 5 extension for the Glock 43X and 48 OEM 15-round magazine, increasing its capacity to 20 rounds. Made from durable 6061 aluminum with a corrosion-resistant finish, the extension ensures reliable feeding, requires no gunsmithing for installation, and comes with a lifetime warranty and replacement springs.
The Glock 43X and Glock 48 OEM 15-round magazine is Glock’s newest slim-profile pistol magazines on the market. The Shield Arms +5 Extension takes it further—adding 5 rounds of capacity to bring your total to 20 rounds, with the same reliable feeding you expect from your Glock magazines. CNC-machined from 6061 aluminum with a Type II anodized finish for corrosion resistance and durability, this extension installs without gunsmithing and without permanent modification to your magazines or firearm.
Whether you’re running your 43X or 48 in competition, training, duty, or home defense, the Shield Arms +5 Extension gives you a meaningful capacity advantage over the factory configuration—in a package that installs quickly and holds up to hard use. Every extension ships with a plus-power replacement spring to ensure reliable feeding at the increased capacity.
Key Features
via Shield Arms
- +5 Round Capacity Increase: Extends the Glock 43X / 48 OEM 15-round magazine to 20 rounds of total capacity—a meaningful increase for competition stage planning, training efficiency, and duty applications
- 6061 Aluminum Construction: CNC-machined from 6061 aircraft-grade aluminum for a strong, lightweight extension that adds minimal weight and preserves the handling balance of your pistol
- Type II Anodized Finish: Type II anodized for corrosion resistance and long-term durability through years of range use, carry, and training
- Plus-Power Replacement Spring Included: Every extension ships with a plus-power replacement spring engineered to ensure reliable feeding at the increased 20-round capacity—install it with the extension for best performance
- Drop-In Installation: No gunsmithing, no permanent modifications to your magazine or firearm; all necessary hardware included
- Spring for Life Guarantee: Free replacement springs for the life of your extension, forever—learn more
- Lifetime Warranty: Covered by Shield Arms’ 100% lifetime warranty against defects in materials and workmanship
- Made in USA: Manufactured in Bigfork, Montana
Learn more about Shield Arms: https://shieldarms.com/