If you're talking about the firing pin safety on the AR-50 and the fact that it can force the sear down and cause the gun to fire thing? Yes, that can happen with an aftermarket trigger if it doesn't have an internal safety built in.
The firing pin safety on the AR-50 is beyond ridiculously strong. The reason it's that way is it's holding the firing pin spring back under tension and unless you hold the safety when you release it, all that tension is forced onto the trigger. Armalite installs a factory (Shilen) trigger that can take the force. It's when people start to tinker, someone else gets behind the trigger, snaps the safety and... you should've seen the look on his face!