Ambi safety did not function - TRYBE Defense AR-15 Mil-Spec Complete Lower Parts Kit w/Ambi Mil-Spec Safety Selector

I'm giving this two stars because the all the parts worked except for the ambi safety and one of the main reasons I purchased this kit was for the ambi safety. I tried different detents and springs to make it work, but it would not budge when installed. I looked at the machining where the groove is for the detent and it looked much thinner than a standard safety. I tried two different safety's with the same detent and spring and they worked fine. I bought a $12 ambi safety on sale by Are Stoner and it worked flawlessly. Another reviewer had the same issue so if your here for the ambi safety know that there may be a chance it may not work. I used an Aero lower for this build.