Description
The S15 +2 Pre-Installed Magazine Extension represents the perfect solution for shooters who want maximum capacity without the hassle of self-installation. This factory-assembled package combines our patented S15 Gen 3 Magazine with a precision-installed +2 magazine extension, delivering an impressive 17+1 total capacity. Each unit is professionally assembled by our team to ensure optimal performance and reliability from the first round.
Constructed from precision-machined billet 6061 aluminum with Type-2 anodized finish options, the S15 +2 extension adds just two rounds while maintaining a low-profile footprint suitable for concealed carry. The extension features our innovative easy-access floor plate design that allows for cleaning and maintenance without complete removal, plus index cuts machined into the body for improved grip when drawing from magazine pouches. An upgraded 11-coil power spring ensures consistent feeding pressure across all 17 rounds.
This pre-installed configuration is ideal for concealed carry professionals, competitive shooters, and anyone who demands the highest capacity from their Glock 43X or 48 without adding significant bulk. The combination maintains compatibility with most aftermarket flared magwells and works seamlessly with Shield Arms Magwell for optimized reloads.
Main features:
- 17+1 Total Capacity – Extra rounds for concealed carry for Glock 43X/48
- Factory Pre-Installed – Professionally assembled and tested before shipping
- Precision-Machined Construction – CNC-machined from billet 6061 aluminum for lightweight durability
- Type-2 Anodized Finish – Superior corrosion resistance
- Easy-Access Floor Plate – Unique design allows cleaning and servicing without complete extension removal
- Enhanced Grip Index Cuts – Machined cuts improve tactile feedback when drawing from pouches
- 11-Coil Power Spring – Upgraded spring ensures reliable feeding across extended capacity
- Black Nitrocarburized QPQ Finish – Superior wear resistance on magazine body
- Magwell Compatible – Works with Shield Arms magwells and most aftermarket flared magwells
- Patented Design – Exclusive Shield Arms engineering backed by U.S. patents
- Made in USA – Manufactured and assembled in the United States
Mag Catch Recommendation
We strongly recommend swapping out your plastic OEM mag catch with our Shield Arms steel mag catch. If you don’t swap your mag catch you may have reliability issues.






