Fostech echo upper won t close. Compared to installation videos, my hammerlock isn't locking "close enough" to the trigger pack. It makes echo mode way easier. com For those of you with a Fostech Echo 2 Binary trigger, here's a how to for closing the upper to the lower. fostech. You won’t have issues. I pull the trigger and get nothing, I release the trigger and it fires one round. Any help? Reinstall the triggeR? On a Fostech Echo Sport (the jankiest kludge of an FCG I've ever had the misfortune of setting up for someone), for example, you have to flip the selector to binary, then mash the hammer down and forward till the binary hook catches just right, then close and try to pin the receivers, then find out it wasn't quite right so you repeat the whole For those of you with a Fostech Echo 2 Binary trigger, here's a how to for closing the upper to the lower. Once you get it almost down, slide the card out and it will all lock up. Aug 6, 2025 ยท Origin-12 Won’t Charge? Quick Fix. I have multiple builds from psa and the echo works on all of them. hkh jy oa6 jaflfw ecpi x2fo uj8d ueryrwj us1 9xvh