M1A / M14 12-32 Thread Scope Mount Chasing Tool

M1A / M14 12-32 Thread Scope Mount Chasing Tool The Scope Mount Thread Chasing Tool for the M1a, M14 is for cleaning as well as for minor thread repair on receiver left-side threaded hole. Using this tool prior to installing the scope mount will help prevent damage to the receiver and hex screw caused by dirt and heat treat scale in the receiver threads.