ProMag-AR15M16-Lower-Receiver-Magazine-Well-Vise-Block-Black
The ProMag PM123 Vise Block allows the user to work on and install parts to AR-15 / M16 lower receivers. The block slips into the rifle's magazine well and is held in place by the rifle's magazine catch; the block is then locked into the users vise. Constructed of black injection molded polymer.
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