Franklin binaty trigger - OpticsPlanet Exclusive Franklin Armory BFSIII AR-C1 Trigger - Binary Firing System for AR Platforms

It was easy to install, but you have to have a slave pin it makes it much easier. I installed mine in a matter of minutes and it works flawlessly. I’ve been using it for about two years now and I never had a problem. It has treated me well and I highly recommend it. I know some reviewers have some bad things to say about it, but they fit and finish on. Mine were perfect & functions flawlessly lots of fun And make sure you bring a lot of ammo when you go shoot