Not worth the money - Fostech Echo AR-II Drop-In Binary AR-15 Trigger

I bought the Echo trigger 2 and the Fostech BCG that is supposed to to work with it and it didn’t even fire 6 rounds with the trigger. Then I tried my high dollar BCG made by KAK and it still didn’t work. I was even adjusting the gas tube. It said nothing about it not working suppressed. I guess if the gun store can’t fix it then I am out a lot of money.