ArmaLite B-Series Gen II 25rd Magazine 308 Win/243 Win Black

The ArmaLite B-Series Gen II magazine delivers enhanced reliability and feeding consistency for AR-10 pattern rifles chambered in 308 Winchester and 243 Winchester. This detachable 25-round magazine features improved follower geometry and spring tension calibrated specifically for ArmaLite's B-Series rifles.

What Makes This Different

The Gen II design addresses feeding issues common in first-generation AR-10 magazines through redesigned follower angles and optimized spring rates. Unlike generic aftermarket magazines, this factory ArmaLite magazine maintains precise dimensional tolerances that ensure consistent lockup and reliable ejection. The anti-tilt follower prevents nose-diving of cartridges during rapid fire sequences.

Key Features

• 25-round capacity for extended shooting sessions without frequent reloads
• Anti-tilt follower design prevents cartridge jamming and double feeds
• Hardened steel spring maintains consistent tension through thousands of cycles
• Polymer construction reduces weight while maintaining structural integrity
• Textured grip panels provide secure handling during tactical reloads
• Compatible with ArmaLite AR-10 B-Series rifles and similar DPMS pattern firearms
• Witness holes allow quick round count verification

Field testing demonstrates consistent feeding with both 308 Winchester match ammunition and hunting loads. The magazine functions reliably in temperature extremes from -20°F to 140°F without spring fatigue or feeding malfunctions. Competition shooters report smooth bolt-hold-open engagement and positive magazine insertion across multiple rifle configurations.

Technical Specs

• Capacity: 25 rounds
• Caliber: 308 Winchester, 243 Winchester
• Material: High-impact polymer body with steel spring
• Length: Approximately 7.5 inches
• Width: 0.8 inches
• Weight: 4.2 ounces empty
• Compatibility: ArmaLite AR-10 B-Series, DPMS pattern rifles
• Finish: Matte black
• Country of Origin: USA

This factory magazine eliminates the compatibility concerns associated with aftermarket alternatives while providing the extended capacity serious shooters demand. ArmaLite's quality control standards ensure each magazine meets military specifications for durability and function.