CAA Gear Up damage your firearms

I got my self a MCK (micro conversion kit) for my 9mm Glock. After following the instructions of the owner manual as well as looking at there Facebook page I installed my 9mm into the MCK and had no problem but the second time I did this my Glock had Damage on the front end of my Glock. Later on I found that the Owner manual and the information on the Facebook page is wrong.

I am truly disappointed in this device as I followed instructions and ended up in damages to my firearm.