FAB Defense Ultimag 30R — 30-Round Polymer Window Magazine — .223 Rem / 5.56×45mm NATO — Flat Dark Earth (FDE)
Model: FXUMAGR30T | UPC / EAN: 7290105947314
Upgrade your AR-platform with the FAB Defense Ultimag 30R — a rugged, lightweight, and highly reliable 30-round polymer magazine engineered for modern sport, duty, and tactical shooting. Designed specifically for .223 Remington / 5.56×45mm NATO cartridges and made to fit AR-15 / M16 / M4 pattern rifles, the Ultimag blends reinforced polymer construction, a clear side-window for quick round counts, and enhanced feed geometry for dependable function under demanding conditions.
Built to Perform — Reinforced Polymer Construction
The Ultimag 30R features a tough, glass-filled reinforced polymer body that keeps weight low while resisting impact, corrosion, and environmental wear. Unlike stamped steel magazines, this polymer design won’t rust and is less likely to dent — preserving feed-lips geometry and long-term reliability. The FDE finish provides a modern, low-glare tactical look that complements FDE furniture and aftermarket accessories.
Fast Visual Checks — Transparent Window Design
A full-length translucent side window allows instant visual verification of remaining rounds without removing the magazine from the rifle. The clear panel is engineered to withstand repeated use and gives shooters a decisive advantage in the field for rapid status awareness during training, matches, or duty operations.
Engineered Feed Reliability
The magazine uses optimized internal geometry and a high-quality stainless steel spring to provide consistent upward pressure and clean feeding across a wide range of ammunition types — from lightweight training rounds to heavier match bullets. The follower is anti-tilt and corrosion-resistant, minimizing the risk of malfunctions and ensuring smooth, consistent chambering.
Key Features
Caliber: .223 Remington / 5.56×45mm NATO
Capacity: 30 rounds (standard AR-15 / M4 capacity)
Material: Reinforced glass-filled polymer body with reinforced feed lips
Color / Finish: Flat Dark Earth (FDE)
Model: FXUMAGR30T
UPC / EAN: 7290105947314
Compatibility: AR-15 / M16 / M4 platform rifles and compatible lower receivers that accept standard AR magazines
Window: Full-length translucent side window for quick round count checks
Follower: Anti-tilt polymer follower for reliable feeding
Spring: High-quality stainless or heat-treated spring for long life and consistent tension
Weight: Lightweight compared to steel magazines (typical polymer mag weight range)
Durability: Impact-resistant, corrosion-proof, and temperature stable
Benefits & Advantages
Lightweight, mission-ready: Polymer construction reduces carry weight for shooters who run multiple loaded magazines.
Quick round awareness: The clear side window speeds decision making and reduces guesswork on remaining ammunition.
Durable in harsh environments: Corrosion resistance and impact tolerance make it ideal for marine, humid, and dusty conditions.
Consistent feeding: Anti-tilt follower and precision spring provide reliable chambering across ammo types.
Aesthetic match: Flat Dark Earth finish complements FDE stocks, rails, and accessories for a coordinated build.
Easy maintenance: Polymer body resists solvents and requires only periodic inspection and light cleaning to maintain peak function.
Ideal Use Cases
Range training and high-volume practice sessions
Competition shooting (3-Gun, practical rifle matches)
Patrol and duty rigs where visibility of remaining rounds is useful
Hunting and varmint control with AR platform rifles where lightweight magazines reduce carry fatigue
Any modular AR build that benefits from modern, corrosion-resistant magazines
Maintenance & Care
Inspect regularly: Check feed lips and follower for wear; replace if deformed.
Clean periodically: Wipe out carbon and debris, apply a light film of lubricant to the spring if needed — avoid over-lubrication inside the mag body.
Store properly: Store loaded magazines in moderate temperatures; for long-term storage, consider storing unloaded to preserve spring life.
Replacement parts: Use original FAB Defense parts where available (springs, followers) to maintain best performance.
Compatibility & Fitment Notes
The Ultimag 30R is built to standard AR magazine dimensions — it will fit most Mil-Spec AR-15 / M4 lowers and magazines well. Because there are minor dimensional differences between some aftermarket lowers and magazine wells, verify fit if you are running non-standard receivers or an unusual lower/upper combination.
Safety & Legal Considerations
Always comply with local, state, and national laws regarding magazine capacity and firearm accessories. This product is marketed for lawful sporting, defensive, and professional applications; check local regulations where capacity limits or other restrictions may apply before purchase or import.
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Final Thoughts
The FAB Defense Ultimag 30R (FXUMAGR30T) gives AR-platform shooters a modern magazine solution that balances durability, lightweight construction, and immediate round-count awareness. Whether you’re building a competition rig, outfitting a patrol carbine, or simply upgrading your range kit, this FDE polymer window magazine delivers consistent feeding, easy maintenance, and a rugged aesthetic that complements contemporary rifle builds.
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