XS Sights Armorers Block 3.3 Inch AR Platform Vise Block

The XS AR Upper & Lower Receiver Block is engineered to secure an AR-15/M4, AR-10, or SR-25 receiver in a bench-mounted vise for assembly, modification, and maintenance work. This armorer’s block accommodates assembly, modification, and maintenance of virtually all AR pattern modern sporting rifles. Unlike blocks limited to a single receiver style, the XS design handles any AR pattern upper and lower receiver—AR-15, AR-10, SR25, or DMPS GII—with equal capability. The block includes pins to lock the receiver in place. Built from 6061 T6 aluminum and Made in the USA by XS Sights, this versatile design offers a single solution across multiple platforms. For bracing into the mag well of AR10 lowers, XS offers a 3D printed adaptor plate available for purchase or home-printing. This block will not work for ARs in .300 Win Mag or 12 ga.