Shield Arms has been producing magazine extensions for some time now and include a variety of color and capacity options. Their main offering looks to be a plus 5/4 (+5 for 9mm/+4 for .40S&W). However, they are currently taking pre-orders for their newest additions for the Glock 43X and Glock 48. The 43X/48  has two options, one extension will add four rounds to the magazine’s capacity and the second extension offers an additional three rounds. Shield Arms have listed the 43X/48 extensions for $39.99. The extension for the standard Glock 43 is listed for $29.99 and adds two to the magazine’s capacity. The specs below are for the upcoming Glock 43X/48 extensions.

The Shield Arms Glock 43X/48 Magazine Extension adds 4 rounds to your OEM Glock 43X/48 magazine. Our unique, easy access floor plate design allows you to quickly access the spring and follower without having to remove the extension from the magazine body. Comes with a 100% lifetime warranty, and the Shield Arms Spring for Life guarantee.

• Unique easy access floor plate design to service or clean the magazine body without the need to remove the magazine extension from the magazine body.
• Index cuts on the extension body to increase grip when coming out of a magazine pouch.
• Machined from billet 6061 aluminum
• Type 2 anodized
• Adds 4 rounds to Glock 43X/48 9mm
• Comes with a +10% power spring
• Fits OEM Glock 43X/48 10 round magazines only
• Proudly made in the USA
• Patent Pending Design
• Fits most aftermarket flared mag wells
• Lifetime warranty

Glock 43X and 48 magazine extension. Image from Shieldarms.com

As previously mentioned, Shield Arms has also been offering magazine extensions for other popular pistol models as well. They currently have extensions for 9mm and .40S&W Glocks (17, 19, 19X, 22, 23, 26, 27, 34, 35, 43, 45), CZ (P10c, P07, P09) and the Sig P320. Shield Arms lists that they sell extensions for Smith & Wesson, however, I was not able to find any current product images or specification pages.

Shield Arms’ magazine extension for the Sig P320. Image from Shield Arms

Last year, Shield Arms also released their SA-9 carbine and pistol. Their Glock magazine extensions were also featured in the photos.

Shield Arms’ SA-9 pistol. Image from Shieldarms.com

You can check out the Shield Arms’ installation video for the Glock models below:

Let us know what you think about the Shield Arms magazine extensions in the comments section. Have any of you already been using them?