The Faxon Magazine Extension for Glock Mod 3 in black adds three rounds and a better grip surface to your standard Glock magazine without compromising reliability or ergonomics. Three extra rounds is a full magazine of margin in a defensive encounter and a stage-winning advantage in competition.
Magazine extensions are one of the few upgrades that improve both capacity and handling at the same time. The trick is doing it without introducing feeding problems, and this one was engineered around that constraint.
What the Faxon Magazine Extension is and who it is for
This is a Mod 3 base pad extension precision-machined from durable aluminum and finished in hard-anodized black. It replaces the factory floorplate on compatible double-stack Glock magazines and increases capacity by three rounds.
Competition shooters gain reload economy and a longer magazine body to index during a slam. Defensive carry users gain capacity without changing the pistol itself. Range shooters simply spend less time loading and more time shooting.
Because the sleek profile blends seamlessly with OEM magazines, the finished magazine looks factory rather than bolted together. That matters to anyone who wants an upgrade that does not announce itself.
Key features of the Faxon Magazine Extension Mod 3
- Adds three rounds of capacity to compatible double-stack Glock magazines.
- Precision-machined from durable aluminum for strength without excessive weight.
- Hard-anodized black finish that resists corrosion, impact, and long-term wear.
- Toolless design that allows quick installation and removal with no gunsmithing required.
- Steel locking plate that secures the extension and maintains structural integrity under recoil.
- Enhanced spring tension for reliable feeding and lock-back during high round-count sessions.
Specifications and why they matter
Aluminum construction is the core specification. It gives the extension enough rigidity to survive being dropped on concrete during reloads, which is exactly what happens to competition magazines, while keeping added weight low enough that magazine drops stay clean and fast.
The hard-anodized finish is what keeps it looking right after a season of use. Anodizing hardens the surface layer of the aluminum itself rather than sitting on top like paint, so it resists the scuffing that magazine base pads inevitably collect.
The steel locking plate is the detail that separates a serious extension from a cheap one. Recoil tries to shear base pads off magazines, and a steel plate carries that load where a plastic part would eventually crack.
Enhanced spring tension addresses the other half of the equation. Adding length to a magazine without upgrading spring pressure leads to sluggish feeding and failed slide lock as the spring settles, and this kit accounts for that from the start.
Installation, care, and compatibility
The Faxon Magazine Extension installs toolless, so you can convert a magazine in your lap at the range with nothing more than your hands and a little patience. Unload the magazine completely, release the factory floorplate while controlling the spring, swap in the new plate and body, and confirm the assembly locks up tight before loading.
Function check every extended magazine before trusting it. Load it to full capacity, cycle rounds through by hand, and then run it live to confirm both feeding and slide lock on the last round. Do this with each magazine individually rather than assuming.
Keep the interior clean. Extensions add length that collects dust and lint, so break the magazine down periodically, wipe the follower and spring, and reassemble dry rather than oiled. Oil inside a magazine attracts grit.
Compatibility is limited to double-stack Glock magazines of the correct pattern, so confirm your model before ordering. You can find magazines, base pads, and other pistol upgrades in our apparel and gear collection.
Built by Faxon Firearms, this extension is a small part that changes how a pistol runs. Ships direct to your door, no FFL required.
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