Magpul MAG536 BEV Block AR-15/M4 Upper Lower Receiver Tool

The Magpul MAG536 BEV Block transforms AR-15 and M4 maintenance from a frustrating experience into precise, controlled work. This barrel extension vise block eliminates the wobble and potential damage associated with standard receiver blocks during upper and lower receiver servicing.

What Makes This Different

Unlike traditional receiver blocks that clamp onto the magazine well, the BEV Block secures directly into the barrel extension. The steel support shank provides rigid support while the polymer body prevents marring of the receiver. This design distributes clamping forces across the barrel extension rather than stressing the aluminum receiver walls, reducing the risk of damage during intensive work.

Key Features

• Steel support shank interfaces directly with barrel extension for maximum stability
• Black polymer construction prevents scratching and marring of receiver surfaces
• Compatible with both AR-15 and M4 upper and lower receivers
• Eliminates flex and movement during barrel nut installation and removal
• Designed to work with standard bench vises and receiver vise blocks
• Compact profile allows access to receiver components during maintenance
• Durable construction withstands repeated clamping forces

The BEV Block excels in professional armorer environments and home workshops where precision matters. Gunsmiths rely on this tool for barrel installations, free-float handguard mounting, and gas block alignment. The rigid support prevents the upper receiver flexing that can cause timing issues with gas systems or improper barrel nut torque specifications.

Technical Specs

• Material: High-strength polymer body with steel support shank
• Color: Black
• Compatibility: AR-15/M4 platform rifles with standard barrel extensions
• Weight: Approximately 8 ounces
• Manufacturer: Magpul Industries
• Model: MAG536
• Country of Origin: United States

Professional armorers and serious builders recognize the BEV Block as essential equipment for proper AR-15 maintenance. The investment in quality tooling pays dividends in reduced work time and elimination of costly receiver damage from inadequate support systems.