CMMG 66AFC70 10-Round Magazine 6.5 Grendel/6mm ARC AR-15 Black

The CMMG 66AFC70 magazine delivers reliable feeding for 6.5 Grendel and 6mm ARC cartridges in AR-15 platform rifles. This 10-round capacity magazine addresses the specific dimensional requirements of these larger cartridges while maintaining compatibility with standard AR-15 lower receivers. Built with stainless steel construction and a black finish, it provides the durability needed for consistent performance across multiple shooting disciplines.

What Makes This Different

Unlike standard 5.56/.223 magazines, the 66AFC70 features modified internal geometry specifically engineered for the larger case dimensions of 6.5 Grendel and 6mm ARC cartridges. The magazine body width accommodates the increased case taper and shoulder angle of these cartridges without binding or feeding issues. CMMG's design eliminates the feeding problems commonly experienced when attempting to use standard AR magazines with these larger cartridges, achieving reliable function across the full capacity range.

Key Features

• 10-round capacity optimized for 6.5 Grendel and 6mm ARC cartridges
• Stainless steel construction with corrosion-resistant black finish
• Modified follower geometry prevents cartridge binding and tilting
• Compatible with all standard AR-15 lower receivers and magazine wells
• Enhanced feed lips designed for consistent cartridge presentation
• Anti-tilt follower maintains proper cartridge alignment during feeding
• Standard AR-15 magazine release compatibility for quick changes

Field testing demonstrates consistent feeding reliability across temperature ranges from -20°F to 140°F. The magazine functions reliably in competitive precision rifle matches, hunting applications, and tactical training scenarios. The stainless steel body resists corrosion in humid environments while maintaining dimensional stability under repeated loading cycles. Feed reliability remains consistent through the magazine's full capacity without the bolt-over-base malfunctions common with improvised magazine solutions.

Technical Specs

• Capacity: 10 rounds
• Cartridge Compatibility: 6.5 Grendel, 6mm ARC
• Platform: AR-15 standard magazine well
• Body Material: Stainless steel
• Finish: Black coating
• Overall Length: Approximately 7.5 inches
• Follower: Anti-tilt polymer construction
• Spring: Heat-treated steel
• Manufacturer: CMMG Inc., USA

This magazine eliminates the guesswork and reliability issues associated with modified 5.56 magazines or aftermarket conversion kits. CMMG's engineering ensures proper function with factory ammunition from major manufacturers. The 10-round capacity meets hunting regulations in most states while providing sufficient capacity for precision shooting applications.