Cmmg 55Afc5B 30Rd 5.56Mm Fits Mk4/Ar15 Black Polymer

The CMMG 55AFC5B is a 30-round polymer magazine built to run reliably in your AR-15 or CMMG MK4 platform rifle. If you're building or maintaining a modern tactical rifle, an MSR for competition, or a go-to carbine for the range or field, having dependable magazines on hand isn't optional—it's foundational. This CMMG offering delivers proven performance in a format that's become the standard across the industry.

CMMG magazines are engineered for consistent feeding and durability. The polymer construction keeps weight down and resists corrosion, while the 30-round capacity strikes the practical balance most shooters prefer: enough rounds to engage targets without excessive bulk in the magazine well. Whether you're zeroing a new build, training at distance, or running drills on a clay course, having a magazine you can trust matters.

This magazine fits standard AR-15 platform rifles and CMMG MK4 variants, making it a versatile addition to any 5.56 NATO setup. Black polymer is tough, affordable, and blends seamlessly with modern furniture. Stock several of these and you'll have the foundation for serious shooting without breaking the bank on gear.

Key Features

• 30-round capacity for extended range sessions and tactical training
• Polymer construction for lightweight reliability and corrosion resistance
• Compatible with AR-15 and CMMG MK4 platform rifles
• 5.56 NATO chambering ensures broad ammunition compatibility
• Black finish integrates with modern rifle builds

Specifications

Frequently Asked Questions

Will this magazine fit my AR-15?

Yes. The CMMG 55AFC5B is designed to work with standard AR-15 platform rifles and CMMG MK4 variants, both of which share the same magazine well.

What ammunition does this magazine feed?

This magazine is chambered in 5.56 NATO, the standard for modern AR-platform rifles. It will feed standard 5.56 NATO ammunition reliably.

Is polymer as durable as metal for magazines?

CMMG's polymer magazines are engineered for durability and reliability. Polymer resists corrosion and keeps weight down compared to metal, making it a practical choice for training, range work, and field use.

How many magazines should I own?

That depends on how often you shoot and your use case. Most shooters find that owning three to five quality magazines per rifle is a solid baseline for consistent training and reliable operation.