yes , before the forearm is installed and then tightened down everything works fine . Once I install the forearm and tighten down the retaining nut the trigger goes limp even if the hammer is cocked or not .
OK I think what the problem was I didnt have the gas piston hardware in the right order .It may not have been letting the bolt carrier go all the way into battery .I am sure that like most guns the trigger is inoperable if the bolt is not all the way forward into a full battery position .