Description
FAB Defense redesigned their popular Ultimag line from scratch to create the ULTIMAG G2, a no-nonsense 30-round polymer magazine for 5.56 NATO and .223 Remington. The G2 drops the window of the original model, focusing instead on a simpler, more durable design that's been proven under real-world conditions.
Why the Windowless Design Works
Removing the transparent sides isn't about cutting corners. The solid polymer body eliminates a potential weak point while keeping weight minimal. Instead of relying on a window for round count, the G2 includes a high-visibility blue follower that makes last-round identification quick and obvious. The exterior features flat marking areas where you can write or tape load information, a feature military and law enforcement users requested.
Built for Reliability and Long-Term Storage
Internally, the ULTIMAG G2 features all-new geometry and reinforced feed lips designed to last through thousands of rounds of hard use. The upgraded extended-life spring handles both the punishment of daily shooting and the stress of staying loaded in storage for extended periods. If you need to break it down for cleaning, everything disassembles without tools in seconds.
The textured polymer grip makes handling and reloading smooth even when your hands are wet, cold, or gloved. It seats firmly in your magwell and feeds reliably every single time. This is a magazine that works without drama, exactly what you want when it matters most.
Key Specifications
- Caliber: 5.56×45 NATO, .223 Remington
- Capacity: 30 Rounds
- Magazine Type: Detachable AR-15/M4/M16 Compatible
- Material: Reinforced Polymer
- Design: Windowless
- Follower: High-Visibility Blue for Last-Round Identification
- Spring: Extended-Life Design
- Feed Lips: Reinforced
- Surface Texture: Multi-Textured for Enhanced Grip
- Disassembly: Tool-Free
- Marking Areas: Flat External Surfaces for Easy Identification
- Manufacturer: FAB Defense
- Manufacturer Part Number: FXUMAGG230B
- UPC: 7290111587412
What’s Included
- FAB Defense ULTIMAG G2 5.56×45 NATO 30-Round Magazine
Frequently Asked Questions
How does the ULTIMAG G2 compare to the original windowed Ultimag?
The G2 was designed from the ground up as a simpler, more durable alternative. It removes the transparent side windows and adds reinforced feed lips, an improved internal geometry, and an extended-life spring. The blue follower for last-round identification and flat marking areas replace the window's function. You get the same reliability FAB Defense is known for at a better value.
Can I use this magazine in my AR-15 or M4?
Yes. The ULTIMAG G2 is fully compatible with AR-15, M4, and M16 platform rifles. It seats securely in any standard magwell and feeds 5.56 NATO and .223 Remington reliably. The magazine works with all standard rifle maintenance and operation.
Is tool-free disassembly really necessary?
For routine cleaning, yes. Magazine springs and followers can collect debris and carbon buildup over time. Being able to break down the ULTIMAG G2 by hand in seconds makes maintenance quick and straightforward. You won't need to carry special tools or struggle with takedown.
How does the extended-life spring hold up with long-term loaded storage?
Magazine springs lose strength over time, especially when kept fully loaded. FAB Defense upgraded the spring specifically to handle extended periods of full storage without losing its reliability or snappiness. This magazine performs consistently whether you load it fresh from the box or pull it from long-term storage.





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