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CMMG MK4/AR15 5.7x28mm Magazine - High Capacity, Durable Construction
$28.38
$27.94
$39.95
(You save
$12.01
)
- Capacity-Rounds:
- 32
- Type:
- Magazines
- Caliber-Gauge:
- 5.7x28mm
- Model:
- Replacement Magazine
- Material:
- Polymer
The CMMG MK4/AR15 5.7x28mm magazine is purpose-built for shooters running a 5.7x28 conversion upper on a standard AR-15 platform. If you've invested in CMMG's 5.7x28 Radial Delayed Blowback upper receiver, this magazine is engineered specifically to feed reliably with that system and Mk4/Mil-Spec AR15 lower receivers. Available in 32-round and 10-round capacities, it gives you the option to configure your 5.7 AR for either high-volume range sessions or compliance-minded carry scenarios.
CMMG redesigned this magazine with real improvements to the fundamentals. Upgraded feed lips ensure consistent, trouble-free feeding with the 5.7x28 cartridge, while the new texture pattern on the grip surface makes magazine changes faster and more secure, even under stress or with wet hands. The caliber designation is engraved directly on the magazine body, so you'll never mix it up with your 5.56 or 9mm mags in a kit bag.
Built for durability and purpose, this is the right magazine for 5.7 AR conversions. Whether you're working a defensive drill, stretching your skills at distance, or just putting rounds downrange, having magazines engineered for your specific upper receiver means one less variable to troubleshoot.
Key Features
- Upgraded feed lips for reliable 5.7x28 feeding
- Textured grip surface for secure, fast magazine changes
- 5.7x28mm engraving to prevent caliber mix-ups
- Designed for CMMG 5.7x28 Radial Delayed Blowback Uppers
- Compatible with Mk4 and Mil-Spec AR15 lower receivers
- Available in 32-round and 10-round configurations
Specifications
| Brand | CMMG |
| Caliber | 5.7x28mm |
| Capacity Options | 32-round, 10-round |
| Compatibility | CMMG 5.7x28 Radial Delayed Blowback Uppers, Mk4/Mil-Spec AR15 lower receivers |
| Feed Lips | Upgraded design |
Frequently Asked Questions
What uppers and lower receivers does this magazine work with?
This magazine is designed to work with CMMG 5.7x28 Radial Delayed Blowback Uppers and Mk4/Mil-Spec AR15 lower receivers.
What capacity options are available?
The CMMG 5.7x28mm magazine comes in both 32-round and 10-round capacities, allowing you to choose based on your mission or local regulations.
Will this magazine feed 5.7x28 reliably?
Yes. CMMG engineered this magazine with upgraded feed lips specifically for consistent 5.7x28 feeding with their conversion system.
Can I use this with standard 5.56 or 9mm AR lowers?
This magazine is designed for 5.7x28 and Mk4/Mil-Spec AR15 lower receivers. It is not intended for use with other calibers or platforms.
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