The BEV Block (Barrel Extension Vise) from Magpul is a compact, all-in-one vise block designed for AR-15/M4 assembly and maintenance tasks such as tightening barrel nuts and installing flash hiders. It mounts securely in a bench vise and provides full-length support for both billet and forged upper receivers. The tool engages the barrel extension with solid steel lugs and uses a steel support shank to prevent flexing, while Magpul polymer is used on other engagement surfaces to protect aluminum receiver finish. An O-ring post interfaces with the bolt carrier for additional stability, and the included pin keeps the upper in the correct position. The BEV Block can be inverted and used as a mag-well vise block to support the lower receiver during maintenance. Made in the U.S.A.
Key Specifications
- Compatible with .223 REM / 5.56 NATO caliber platforms.
- Constructed with polymer engagement surfaces to protect aluminum receivers.
- Features solid steel lugs that engage the barrel extension.
- Includes a full-length steel support shank to prevent flexing during work.
- Finished in black for a low-profile workshop appearance.
- Model designation is BEV.
- Fits AR-15, M4, M16 platforms per manufacturer specification.
- Size specified as Mil-Spec.
- Product type listed as Barrel Extension Vice.
- Manufactured in the U.S.A..
Compact and purpose-built, the BEV Block streamlines routine shop and armorer work by stabilizing receivers and protecting finish while you perform assembly and maintenance tasks. Its dual-use design and robust steel engagement points make it a practical addition to a gunsmith’s bench or a careful hobbyist’s toolkit, providing dependable receiver support without unnecessary complexity.
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