Lapping my Aero Precision M4E1 upper receiver

Using my new lapping tool from G&G Rifle Works to lap my Aero Precision Enhanced M4E1 upper receiver. G&G is the only company that I found that makes this lapping tool for the Aero Precision M4E1 and M5E1 upper receiver. Remember to make sure that you order the right lapping tool for your specific upper receiver !!! You can buy a single lapping tool or the hole set. Enjoy !!!