The BEV Block (Barrel Extension Vise) is an all-in-one, compact vise block tool for AR assembly operations of barrel nuts, flash hiders, etc. Mounts securely in a vise and provides support for both billet and forged upper receivers. Engages barrel extension with solid steel lugs and full length support shank to prevent flexing. Steel hardness is optimized for durability yet won't damage barrel extension, and Magpul Polymer is used for all other engagement surfaces to protect aluminum receiver. O-ring post uses bolt carrier for additional stability and included Pin keeps upper in proper position. The BEV can also be turned over and used as a mag well vise block to support the lower receiver during maintenance, etc. Made in U.S.A.

The Magpul BEV AR15/M4 Block is a versatile and essential tool for any AR assembly enthusiast. This compact vise block securely mounts in a vise, providing robust support for both billet and forged upper receivers during operations involving barrel nuts and flash hiders. Its solid steel lugs engage the barrel extension, while the full-length support shank prevents flexing. Crafted with optimized steel hardness, the BEV Block ensures durability without damaging the barrel extension, and the Magpul Polymer surfaces protect your aluminum receiver. Additionally, it doubles as a mag well vise block for lower receiver maintenance. Proudly made in the USA.