Triggers aren't all the same even if it says so. Good parts equal good service.
I'd sure like to know how an AR can fire out of battery when the firing pin can't reach the primer until the bolt is locked.
Start with the correct size gas port and a good quality extractor/spring kit and you'll eliminate problems from the start.
I've both carbine and mid length gas and find it impossible to tell any difference while shooting. Build em right and they will run.
