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This Shield Arms extension gives you real capacity gains without the bulk of a bigger gun. Drop it onto a standard Glock 19 or 23 OEM magazine, and you're looking at 5 extra rounds for 9mm or 4 for .40 S&W. That's going from 15 to 20 rounds on the 19, or 13 to 17 on the 23.
Most magazine extensions ask you to live with sketchy feeding or require you to swap in a new spring. Shield Arms included a +10% power spring right out of the box, engineered specifically to handle the extra stack height without short-stroking or binding. The billet 6061 aluminum is precision-machined and Type 2 anodized in gray, so it'll hold up to years of draw-and-holster cycles and routine handling. The gray finish matches tactical setups while staying subtle enough for carry.
The easy-access floor plate is a real differentiator here. You can pop open the baseplate in the field to inspect or clean the spring and follower without completely removing the extension from the magazine body. That matters when you're maintaining gear between stages or during duty rotations. Machined index cuts on the sides of the extension give you solid purchase when yanking the mag from a pouch under stress, making reloads faster and more confident.
Installation is straightforward drop-in work on factory Glock magazines. You'll need a basic magazine tool or punch to pop the original baseplate, swap in the new extension with its included spring, and you're done. Works with most aftermarket magwells including Shield Arms' own carry and competition wells. The whole thing is made in the USA and backed by Shield Arms' 100% lifetime warranty plus their Spring for Life guarantee, so you're covered if anything goes sideways.
This extension is designed for OEM Glock 19 and 23 magazines specifically. It is compatible with most aftermarket flared magwells, but it won't fit Magpul PMAGs or other non-Glock magazine bodies. Stick with factory Glock magazines for the best fit and feeding reliability.
Yes, this extension is compatible with Glock 19 and 23 pistols across all generations (Gen 3, 4, 5, and beyond). The magazine geometry is the same across these generations, so you can use the extension on whichever version you own.
Installation is straightforward and can be done in just a few minutes. You'll need a basic magazine tool to remove the factory baseplate, then slip on the new extension with its included spring. Shield Arms ships the extension with all the hardware and wrenches you need, and no permanent modifications are required.
The +10% power spring is necessary because adding rounds increases the stack height of ammunition in the magazine. A standard OEM spring doesn't have enough pressure to reliably feed rounds from that extra height, which could cause failures. Shield Arms engineered this spring specifically for the +5/+4 configuration to ensure feeding works perfectly from the first round through the last.
| UPC | 853465008520 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | G19-ME-5-GREY |
| Model | |
| Product Type | Magazine Extension |
| Color | Gray |
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