Add 3 rounds to your Glock 43X Shield Arms S15 Magazine

Published on January 5, 2024
Duration: 10:08

This guide details the installation of the GlockStore +3 extension onto a Shield Arms S15 magazine for the Glock 43X. The process involves careful disassembly of the factory baseplate, installation of the extension, and reassembly, increasing the magazine's capacity to 18 rounds. The video, presented by Lenny Magill, emphasizes maintaining concealability while enhancing grip and capacity.

Quick Summary

To install the GlockStore +3 extension on a Shield Arms S15 magazine for the Glock 43X, first unload the magazine. Use a punch to carefully remove the factory baseplate, minding spring tension. Install the +3 extension, then reinsert the spring and secure it with the new baseplate. This upgrade increases capacity to 18 rounds.

Chapters

  1. 00:00Intro: Glock 43X Overview
  2. 00:30Magazine Comparisons: Factory vs. S15
  3. 01:47Introducing the GlockStore +3 Extension
  4. 02:46Disassembly: S15 Magazine Baseplate Removal
  5. 04:10Installation: Attaching the +3 Extension
  6. 05:40Ergonomics & Concealability Benefits
  7. 06:25Magwell Compatibility Options
  8. 08:02Capacity Testing: Loading 18 Rounds

Frequently Asked Questions

How do I install the GlockStore +3 extension on a Shield Arms S15 magazine for the Glock 43X?

First, ensure the magazine is unloaded. Depress the detent on the factory S15 baseplate to remove it, being mindful of spring tension. Remove the spring and follower. Slide the GlockStore +3 extension onto the magazine body, then reinsert the spring and capture it with the new baseplate. Ensure proper fit and consider the set screw for magwell compatibility.

What is the total capacity of a Glock 43X with a Shield Arms S15 magazine and a +3 extension?

The Shield Arms S15 magazine itself holds 15 rounds of 9mm ammunition. When combined with the GlockStore +3 extension, the total capacity increases to 18 rounds, offering a significant boost over the factory 10-round magazine.

Does the GlockStore +3 extension affect the concealability of the Glock 43X?

While adding capacity, the GlockStore +3 extension is designed to minimize added bulk. It also provides an improved grip surface for the pinky and palm, which can enhance control without significantly compromising concealability for everyday carry.

What tools are needed to install the GlockStore +3 extension on an S15 magazine?

The primary tool required for the installation is a punch to depress the detent on the factory S15 magazine baseplate. An optional tool like the Lula Universal Magazine Loader can be helpful for testing the magazine's full 18-round capacity after installation.

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