CMMG 57AFD1E Magazine Extension 5.7x28mm +10 Round FN Five-seveN

The CMMG 57AFD1E magazine extension transforms standard FN Five-seveN magazines into high-capacity feeding systems, adding 10 additional rounds to the factory 20-round capacity. This precision-machined extension maintains the pistol's balance while providing extended shooting sessions without frequent reloads.

What Makes This Different

Unlike universal magazine extensions that compromise reliability, the CMMG 57AFD1E is specifically engineered for FN Generation 1 Five-seveN magazines. The extension maintains the magazine's original spring tension geometry through a carefully calculated follower design. Installation requires no permanent modifications to the original magazine, preserving resale value and allowing quick conversion back to standard capacity.

Key Features

• Increases magazine capacity from 20 to 30 rounds of 5.7x28mm ammunition
• Compatible exclusively with FN Generation 1 Five-seveN pistol magazines
• Precision-machined aluminum construction with Type III hard anodizing
• Maintains reliable feeding through optimized spring geometry
• Tool-free installation and removal process
• Retains magazine's original width profile for existing holster compatibility
• Includes replacement follower and extended spring assembly

Competitive shooters benefit from the extended capacity during USPSA and 3-Gun matches where reload speed determines stage times. The extension's lightweight aluminum construction adds minimal weight while the hard anodized finish resists wear from repeated magazine changes. Law enforcement agencies appreciate the additional firepower without requiring new holsters or training on different manual of arms.

Technical Specs

• Caliber: 5.7x28mm
• Capacity increase: +10 rounds (30 total)
• Material: 6061-T6 aluminum with Type III hard anodizing
• Compatibility: FN Five-seveN Generation 1 magazines only
• Weight: 2.1 ounces
• Length added: 1.25 inches to magazine base
• Finish: Matte black hard anodized
• Country of origin: United States

The CMMG 57AFD1E extension delivers proven reliability backed by the company's reputation in the firearms industry. Professional users and competitive shooters choose this extension for its consistent performance and reversible installation. Extended capacity magazines provide tactical advantages in scenarios where reloading frequency matters most.