Faxon Magazine Extension For Glock Mod 5 | 5-Round | Black

The Faxon Magazine Extension for Glock Mod 5 in black adds five rounds to a Glock 19 double stack magazine without turning the magazine into an awkward, snag prone club. It is CNC machined from 6061-T6 aircraft grade aluminum, hardcoat anodized in black, and contoured to follow the lines of the factory magazine body. For PCC shooters, competitors, and anyone who wants more rounds between reloads, that is a lot of capability from a very small part. Twenty rounds in a Glock 19 magazine changes the math on a stage.

Who the Faxon Magazine Extension Is For

This extension is designed specifically for Glock 19 double stack magazines, boosting capacity by five additional rounds. It replaces the factory baseplate assembly and takes the place of the floorplate on the bottom of the magazine tube.

Pistol caliber carbine shooters are the obvious audience, since a PCC magazine well places no practical restriction on magazine length and every extra round saves a reload. Competitive pistol shooters benefit for the same reason. Range shooters who simply hate loading magazines will appreciate it too.

Key Features

The engineering behind this Faxon magazine extension is straightforward, which is exactly what you want on a part that lives at the bottom of a magazine.

• Adds five rounds of capacity to Glock 19 double stack magazines.
• Precision CNC machined from 6061-T6 aircraft grade aluminum.
• Black hardcoat anodize finish for corrosion and abrasion resistance.
• Lightweight, low profile design that adds capacity without upsetting balance.
• Contoured body that follows OEM Glock 19 magazine dimensions to maintain holster and mag pouch compatibility.
• Smooth exterior profile that resists snagging during draws and reloads.

Specifications and Why the Material Matters

The Faxon magazine extension is machined from 6061-T6 aircraft grade aluminum, finished in black hardcoat anodize. Capacity gain is five rounds on a Glock 19 double stack magazine. The Mod 5 designation identifies this generation of the Faxon extension line.

Aluminum is the right call here for a specific reason. Polymer extensions flex when a fully loaded magazine is slammed into a well or dropped on concrete, and that flex is where feeding problems begin. Machined aluminum holds its dimensions, which keeps the spring and follower geometry consistent as the magazine empties.

Hardcoat anodizing is a thicker, harder finish than standard anodize. On a part that gets dragged across concrete every time you drop a magazine, that difference shows up quickly.

Installation, Use, and Care

Installation follows the normal Glock magazine disassembly procedure. Depress the floorplate retention, slide the factory floorplate off while controlling the spring, then fit the extension components per the included instructions. Keep a thumb on the spring, because it wants to leave.

Verify function before you trust the magazine. Load it to full capacity, cycle it by hand through the pistol or carbine, and then shoot it. Any magazine modification deserves a live fire check before it goes into a competition or a duty role.

Keep the extension and the magazine tube clean, especially at the seam where they meet, since grit collecting there is what causes a follower to bind at the bottom of the stack. Wipe it down after a dusty match and check the retention hardware periodically. Note that magazine capacity limits vary by state and locality, so confirm your local rules before ordering. Explore more upgrades and range gear in our apparel and gear category.

Holster compatibility is worth a specific mention. Because the extension follows OEM Glock 19 magazine dimensions rather than flaring outward, spare magazine pouches sized for a factory magazine generally still work. That is not true of every extension on the market, and it saves you from rebuying pouches to match a new part.

Finally, remember that a magazine extension changes spring travel. Faxon supplies the correct components for the added length, so use what comes in the package rather than reusing a factory spring, and replace springs on any magazine that has spent years loaded to capacity.

Five more rounds, no added bulk, and machining quality you can see, courtesy of Faxon Firearms. It is one of the cheapest meaningful performance upgrades a Glock shooter can make. Ships direct to your door, no FFL required.