Shield Arms S15 Gen 3 20-Rd Magazine w/ +5 Extension for Glock 43X/48 - Black Nitride Steel

The Shield Arms S15 Gen 3 magazine is a high-capacity solution for shooters who want more rounds on tap from their Glock 43X or 48 without switching to a larger frame. This 20-round magazine ships with a +5 extension, giving you genuine capacity gains while maintaining the compact handling these popular subcompacts are known for. If you run a 43X or 48 for concealed carry, home defense, or the range, the S15 Gen 3 lets you push your round count up significantly without sacrificing the gun's concealability.

Shield Arms engineered these magazines with black nitride steel construction, a finish that resists corrosion and wear through heavy use and repeated loading cycles. Whether you're stocking spares for a duty rotation, building a reliable magazine fleet for serious practice, or just want backup capacity on hand, the Gen 3 design is built to feed reliably and last.

The +5 extension included with this magazine effectively transforms a single-stack 43X or 48 into a much more capable platform. It's a straightforward upgrade for anyone already invested in these frames and looking to maximize their utility without buying a new gun.

Key Features

• 20-round capacity with +5 extension included
• Engineered for Glock 43X and 48
• Black nitride steel construction for corrosion resistance and durability
• Purpose-built for reliable feeding and consistent performance

Specifications

Frequently Asked Questions

Will this magazine work with my Glock 43X or 48?

Yes, the S15 Gen 3 is specifically engineered for the Glock 43X and 48.

What's included with this magazine?

The S15 Gen 3 ships with a +5 extension already included, giving you the full 20-round capacity out of the box.

What's the benefit of the +5 extension?

The +5 extension increases your magazine capacity from the factory standard, allowing you to carry or store significantly more ammunition without switching to a larger frame gun. It's especially useful for training, competition, or shooters who prioritize higher capacity.

Is black nitride finish durable?

Black nitride is a proven finish that resists corrosion and wear. It holds up well to repeated loading, unloading, and field use.