The Shield Arms Steel Mag Catch (brand part number G43X-EMR-BLUE) is a replacement magazine release built for the Glock 43X and Glock 48, optimized to work with the Shield Arms S15 magazine. Shield Arms machines this catch from steel rather than the factory polymer, and while it remains compatible with plastic OEM magazines, the company specifically recommends steel-on-steel or plastic-on-plastic pairings for the best wear characteristics. Prolonged use of a steel catch with plastic OEM magazines can accelerate wear and may prevent mags from dropping free, so shooters running mixed magazine types should plan accordingly. Owners with a first-generation aluminum mag catch should note it may not work with Gen 2 S15 magazines, and Shield Arms recommends upgrading to one of its steel catch offerings, like this one, for full compatibility.

Key Specifications

• Built for the Glock 43X and Glock 48.
• Machined from steel rather than factory polymer.
• Optimized to work with the Shield Arms S15 magazine.
• Compatible with plastic OEM magazines, though steel-on-steel or plastic-on-plastic pairing is recommended.
• Finished in blue for a distinct accent color.
• Recommended as an upgrade for owners with an incompatible first-generation aluminum mag catch.

Frequently Asked Questions

Will this catch work with factory Glock magazines? It remains compatible with plastic OEM magazines, though Shield Arms recommends steel-on-steel or plastic-on-plastic pairings for best wear.

What is this catch optimized for? The Shield Arms S15 steel magazine.

I have a first-gen aluminum mag catch, will it work with Gen 2 S15 mags? It may not; Shield Arms recommends upgrading to a steel catch like this one for full compatibility.

Buy the Shield Arms Steel Mag Catch

Order the Shield Arms blue steel mag catch for your Glock 43X/48 from our Lubbock, Texas gun shop for fast, insured shipping. Browse more Shield Arms small handgun parts for your build.