NO-M.A.R AR15 Upper Receiver Vise Block 223 556 barrel nut install tool

CNC cut NO-M.A.R polymer protects receivers finish.
Install and remove barrels that fit AR-15 Flat Top receivers.
Works with Bolt Group & Handle installed or removed.
Works in any bench vise that opens 3.5 Inches wide.
Use Horizontally to remove or install barrels.
Use Vertically for cleaning & hand guard removal.
Full width block & 6″ Rail Cap for big or small vises.
Includes two 1/4″ diameter steel pins and retaining clips.