ProMag AR-15/M16 Lower Receiver Magwell Vise Block, Black - PM123

This vise block provides a third-hand tool for working on and installing parts to AR-15/M16 lower receivers. It clamps into a standard vise and inserts into the lower receiver's magazine well, holding in place via the magazine catch. Constructed of black injection-molded polymer and made in the U.S.A.