Strato from United States, OH Public Profile

I purchased 2 Fostech EchoSport binary triggers. I looked at the video but it was dark so I looked at the instructions, which I thought was hard to follow. I made a mistake and the whole thing fell apart. Luckily, there weren't that many parts and I had the second one to look at. I was able to figure it out, put it back together and measured the trigger pull - between 9 and 10 lbs. I called customer service and was very pleased because she said that they would give me a shipping label for me to send it back. She also mentioned that by the ATF their trigger must be between 7 and 9 lbs. I probably won't send it back because I'm within tolerance. I went back online and found the perfect video on how to put the trigger in. Now I installed the second trigger in another AR15 and it went smoothly. In semi-auto no problems, but in Echo mode, letting off the trigger didn't drop the hammer. I removed the trigger, no problems, and installed it into another AR15, again no problems, except it still didn't work in Echo mode. I'm going to send it back to Optics Planet.