Backup Tactical115696379
Enhanced Capacity Red Mag Extension for Glock 19/23 - Adds +5 Rounds$54.99
Availability: In Stock
The Apex Tactical Specialties FNX 45ACP magazine extension is a straightforward upgrade for shooters running FNX-45 pistols who want more rounds on tap without swapping to a different platform. This base pad extension adds two rounds to your standard FNX magazine, giving you the extra capacity advantage in competition, duty, or serious carry scenarios. Because Apex engineered it carefully—leaving just enough room to load the added rounds while still allowing the spring to compress enough that a fully loaded extended magazine seats smoothly with the slide in battery—you get genuine usable capacity, not a gimmick.
Installation is refreshingly simple: a single set screw holds the extension in place and lets you remove it just as easily if you need to swap back to standard mags. The aluminum construction gets a Black Type III Hardcoat Anodize finish, so it'll handle holster wear and the occasional fumble without showing its age. Grip matters, and Apex thought about that too—finger grooves around the perimeter and across the front corners give you a solid purchase when you're reloading under stress or just running mags at the range.
One detail worth noting: the extension preserves slide lock function, so your pistol will still lock back on the last round. That means you won't lose that tactile/visual cue that tells you you're dry—critical for training and real-world reliability. If you run FNX-45s hard, this is the kind of no-nonsense mod that earns its place on your gun.
| Brand | Apex Tactical Specialties |
| Firearm | FNX-45 pistol |
| Caliber | 45 ACP |
| Capacity Increase | +2 rounds |
| Material | Aluminum with Black Type III Hardcoat Anodize |
| Installation | Single set screw |
Yes, the Apex Tactical magazine extension is designed to fit FNX-45 model pistols and works with the standard magazines for that platform.
Yes. Apex engineered the extension to maintain slide lock function after the last round is fired, so you'll retain that critical empty-magazine indicator.
A single set screw secures the extension to the magazine base pad. The same screw allows you to remove it quickly if needed, making it easy to swap between extended and standard capacity mags.
Yes. Apex designed the extension to leave enough space for the magazine spring to compress fully, allowing a fully loaded extended magazine to seat smoothly with the slide in battery.
SKU: 121685697 • Width: 3.25in • Height: 1.5in • Depth: 5.5in • Weight: 0.13oz
Availability: In Stock
The Apex Tactical Specialties FNX 45ACP magazine extension is a straightforward upgrade for shooters running FNX-45 pistols who want more rounds on tap without swapping to a different platform. This base pad extension adds two rounds to your standard FNX magazine, giving you the extra capacity advantage in competition, duty, or serious carry scenarios. Because Apex engineered it carefully—leaving just enough room to load the added rounds while still allowing the spring to compress enough that a fully loaded extended magazine seats smoothly with the slide in battery—you get genuine usable capacity, not a gimmick.
Installation is refreshingly simple: a single set screw holds the extension in place and lets you remove it just as easily if you need to swap back to standard mags. The aluminum construction gets a Black Type III Hardcoat Anodize finish, so it'll handle holster wear and the occasional fumble without showing its age. Grip matters, and Apex thought about that too—finger grooves around the perimeter and across the front corners give you a solid purchase when you're reloading under stress or just running mags at the range.
One detail worth noting: the extension preserves slide lock function, so your pistol will still lock back on the last round. That means you won't lose that tactile/visual cue that tells you you're dry—critical for training and real-world reliability. If you run FNX-45s hard, this is the kind of no-nonsense mod that earns its place on your gun.
| Brand | Apex Tactical Specialties |
| Firearm | FNX-45 pistol |
| Caliber | 45 ACP |
| Capacity Increase | +2 rounds |
| Material | Aluminum with Black Type III Hardcoat Anodize |
| Installation | Single set screw |
Yes, the Apex Tactical magazine extension is designed to fit FNX-45 model pistols and works with the standard magazines for that platform.
Yes. Apex engineered the extension to maintain slide lock function after the last round is fired, so you'll retain that critical empty-magazine indicator.
A single set screw secures the extension to the magazine base pad. The same screw allows you to remove it quickly if needed, making it easy to swap between extended and standard capacity mags.
Yes. Apex designed the extension to leave enough space for the magazine spring to compress fully, allowing a fully loaded extended magazine to seat smoothly with the slide in battery.
SKU: 121685697 • Width: 3.25in • Height: 1.5in • Depth: 5.5in • Weight: 0.13oz