Description
The MFT Extreme Duty window magazine is built for shooting that matters. Using next-generation long glass fiber polymer that's 50% stronger and 3x more impact resistant than traditional nylon, this isn't your standard polymer mag. It's engineered to handle extreme conditions and keep working when it counts.
Real-World Features You'll Actually Use
The dual-side anti-glare windows with numerical markers let you see at a glance how many rounds you have left. A high-visibility indicator coil on the spring shows your round count from 0-30 without taking your eyes off what matters. It beats guessing between mags during a training session or at the range.
For handling, MFT added stippled texturing and ribbed gripping surfaces front and rear so the mag won't slip even if your hands are wet or you're wearing gloves. The flared floor plate makes one-handed reloads smoother and gives you something solid to grip when pulling mags from a carrier.
Built to Last
Inside, you get a long-life USGI-spec stainless steel spring that resists corrosion and a four-way anti-tilt self-lubricating follower that keeps rounds aligned and feeding consistent. The oversized bolt catch notch means better bolt hold-open reliability, even on slightly out-of-spec receivers. Tool-less disassembly with double floor plate safety tabs makes cleaning and maintenance quick. The base plate also features drain holes for when you're at a wet range or near water.
At 8.6 inches in length, this mag fits standard AR-15 platforms and most common clones that use STANAG-compatible magazines. The paint pen matrix on the floor plate makes it simple to mark and ID your mags.
Key Specifications
- Manufacturer: Mission First Tactical
- Model: Extreme Duty
- MPN: EXDPM556-W-BL
- UPC: 814002024694
- Capacity: 30 Rounds
- Caliber: .223 Remington / 5.56 NATO
- Platform: AR-15/M4 Compatible
- Material: Next Generation Long Glass Fiber Polymer
- Color: Black
- Length: 8.6 inches
- Spring Type: Long-life USGI-spec Stainless Steel
- Follower: Four-way Anti-tilt Self-lubricating
- Window Type: Dual-side Anti-glare with Numerical Markers
- Bolt Catch: Oversized
- Warranty: Lifetime
What’s Included
- 1 MFT Extreme Duty 30-round window magazine
Frequently Asked Questions
Will this MFT window magazine fit my AR-15 platform?
Yes, this magazine is designed for AR-15 and M4 rifles that use standard STANAG-pattern magazines. It also works with many non-AR15 platforms that have adopted this magazine type. The mag is made to AR-15 specifications and tolerances for a perfect fit.
How does the round count window actually work?
The window has numerical markers printed inside, and the magazine spring includes a high-visibility indicator coil that rises and falls with the rounds. By looking at the window, you can see approximately how many rounds remain without unloading the magazine. It gives you a quick visual reference from 0-30.
What's different about the Extreme Duty polymer compared to other polymer magazines?
MFT uses next-generation long glass fiber polymer that's 50% stronger and 3x more impact resistant than traditional nylon. The longer fiber filaments prevent deformation, increase durability, and allow the mag to maintain integrity at elevated temperatures without adding extra weight.
Can I use this magazine with .300 Blackout?
This magazine is spec'd for .223 Remington/5.56 NATO. While the magazine can physically accept .300 Blackout rounds, you need to be extremely careful not to cross-load or confuse these different cartridges in rifles with interchangeable uppers. Always verify your ammunition matches your barrel markings.






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