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CMMG redesigned their 5.7 AR Conversion Magazine with a fresh profile and meaningful upgrades that add up to real-world performance. Built specifically to work with CMMG 5.7×28 Radial Delayed Blowback uppers and standard Mk4 or Mil-Spec AR15 lower receivers, this magazine delivers the feeding reliability you need whether you're running drills at the range or maintaining your system.
The upgraded feed lips on this CMMG 10-round magazine are engineered to handle consistent, dependable feeding of 5.7x28mm cartridges. Those improvements matter most when you're running your platform hard, and they show up in the details. Constructed from durable, high-impact polymer with reinforced geometry throughout, the magazine won't let you down in harsh conditions or after thousands of rounds.
The stylized texture grip pattern gives you positive control during reload drills without being aggressive enough to snag on gear. The "5.7x28mm" engraving on the sides isn't just cosmetic either, it's practical. When you're grabbing magazines off a bench or moving between platforms, that quick visual identification saves you from fumbling. The last round bolt hold-open functionality works like it should, giving you a clear indication when the magazine runs empty.
With matte black finishing and all the tactical simplicity you need, this is a straightforward, purpose-built magazine that shows up and works. Whether you're building out a 5.7×28 conversion or stocking up on backup mags, this is the factory CMMG option built by people who understand how these conversions run.
This magazine is specifically designed for 5.7x28mm conversion setups. It works with CMMG 5.7×28 Radial Delayed Blowback uppers paired with standard AR15 lower receivers. It won't work reliably with standard 5.56/.223 AR15 uppers because the cartridge dimensions are completely different.
Yes. This magazine features last round bolt hold-open functionality, so your bolt will lock back when you fire the last round. That means you'll get a clear indication the magazine is empty and faster reload transitions.
Both are built for the same 5.7×28 conversion platform, but this 10-rounder is designed with a lower capacity while the 32-round version gives you more ammunition per magazine. The 10-round capacity fits well with practice sessions and maintenance workflows.
Yes. Every CMMG product comes backed by their Lifetime Quality Guarantee against material and workmanship defects. That gives you confidence in the magazine whether you're running it regularly or storing it as a backup.
| UPC | 810097507630 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 54AFC44 |
| Capacity | 10 |
| Product Type | Magazine |
| Color | Black |
| Caliber/Gauge | 5.7 x 28 mm |
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