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The CMMG Gen II Mk4/AR15 10-round magazine bridges the gap between your standard AR lower and a 9mm platform. When paired with a CMMG 9mm Radial Delayed Blowback upper, this magazine lets you run 9mm from an unmodified mil-spec or Mk4 lower receiver. It's a ground-up redesign from the previous generation, optimized specifically for 9mm use instead of being adapted from existing designs.
CMMG redesigned this magazine from scratch to be a dedicated 9mm solution. Impact-resistant polymer body construction gives you durability and natural corrosion resistance, while the high-tensile steel spring and polymer follower deliver smooth, reliable feeding even during rapid magazine changes. The exterior dimensions match common 5.56 AR-15 magazines, so your existing mag pouches, carriers, and tactical gear work without any adjustments or specialty subgun equipment.
Works with Mk4/AR15 lower receivers paired specifically with CMMG 9mm Radial Delayed Blowback uppers. The magazine features last-round bolt hold-open functionality when used with compatible CMMG RDB systems. The simplified profile means easier loading compared to pistol magazines, and the standard AR feel makes transitions between different calibers on the same lower receiver straightforward.
Whether you're building a pistol-caliber carbine for range fun, home defense, or introducing new shooters to the AR platform, this magazine provides the foundation for reliable 9mm performance. The Gen II design offers better reliability and value than the original generation while maintaining compatibility with your existing kit.
Yes, it's designed to work with mil-spec AR-15 lower receivers. However, you must pair it with a CMMG 9mm Radial Delayed Blowback upper to function properly. The magazine alone won't convert a standard 5.56 lower to 9mm – you need the matching CMMG 9mm upper for reliable operation.
This magazine is specifically designed for CMMG's Radial Delayed Blowback system and may not function reliably with other 9mm AR configurations or direct blowback uppers. CMMG recommends using it only with CMMG 9mm RDB uppers for guaranteed compatibility and function.
Yes. The exterior dimensions closely match common 5.56 AR-15 magazines, so it works with your existing mag carriers and tactical gear without modification. You won't need specialty subgun pouches or equipment.
The Gen II is a complete ground-up redesign dedicated specifically to 9mm, rather than an adaptation of another magazine. It features improved reliability, updated styling, and better value. The Gen II maintains all the essential features like last-round bolt hold-open and standard AR profile compatibility.
| UPC | 810148626761 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 94AFC4E |
| Caliber/Gauge | 9mm |
| Capacity | 10 |
| Color | Black |
| Length | 8.7500 |
| Model | |
| Product Type | Magazine |
| Shipping Weight | 0.414 |
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