Warne MESW54BLK S&W M&P Magazine Extension +5/4 Rounds 6061-T6

The Warne MESW54BLK Magazine Extension transforms standard S&W M&P magazines into higher-capacity platforms, adding 5 rounds for 9mm Luger or 4 rounds for .40 S&W configurations. This precision-machined extension eliminates frequent reloading during extended shooting sessions while maintaining the reliable feeding characteristics M&P shooters expect.

What Makes This Different

Unlike polymer alternatives that can crack under stress, this extension utilizes aerospace-grade 6061-T6 aluminum construction with hardcoat anodizing for superior durability. The precision tolerances ensure consistent magazine spring tension across the extended capacity range. Factory magazines typically hold 17 rounds in 9mm, bringing total capacity to 22 rounds with this extension installed.

Key Features

• Increases capacity by 5 rounds (9mm) or 4 rounds (.40 S&W) over standard magazines
• 6061-T6 aluminum construction with hardcoat anodized black finish
• Direct compatibility with S&W M&P full-size and compact magazines
• Maintains original magazine spring and follower components
• Tool-free installation with secure locking mechanism
• Low-profile design preserves concealability for carry applications
• Corrosion-resistant finish matches factory magazine aesthetics

Competitive shooters benefit from reduced reload frequency during USPSA and IDPA matches, while law enforcement officers gain tactical advantages during qualification courses. The aluminum construction withstands repeated drops on concrete and maintains dimensional stability across temperature extremes from -20°F to 140°F. Magazine insertion and ejection remain smooth with proper grip texture preserved.

Technical Specs

• Material: 6061-T6 aluminum with hardcoat anodized finish
• Compatibility: S&W M&P full-size and compact magazines
• Capacity increase: +5 rounds (9mm Luger), +4 rounds (.40 S&W)
• Finish: Hardcoat anodized black
• Installation: Tool-free attachment system
• Weight: Approximately 1.2 oz
• Country of origin: United States

This extension addresses the capacity limitations of factory M&P magazines without compromising reliability or requiring permanent modifications. The hardcoat anodizing provides superior wear resistance compared to standard Type II anodizing, ensuring long-term performance under demanding conditions.