CrossTac Armorer's AR-15 Vise Block and Hammer Block

Reversible action block inserts into an AR-15 upper or lower receiver and clamps into a vise, firmly positioning the part for nearly any gunsmithing task. Precision CNC-Machined from polyethylene, this action block is impervious to all oils and solvents. Hammer block is ideal for checking a trigger job. Includes a hammer block which snaps into the action block, this eliminates the need to catch the hammer when testing trigger pull.Note: The CrossTac Armorer's Action Block was designed for torquing suppressors, muzzle brakes, flash hiders, and accessories, not for torquing barrels. Doing so can damage the unit. FeaturesMilled from solid polyethyleneResistant to solvents and oilsLocks into magazine well and can then be clamped into a vise