I love Elftmann Triggers. They are the only drop-in after market trigger operated on sealed needle bearings. I know their high end triggers work in all PCC’s. I’ve read they are the only ones with the technology to handle the various AR calibers. They have a short reset and about the cleanest break I ever felt. I saw an article about them on “the truth about guns.” They were compared up against several other triggers and they beat them all. They had the fastest lock time. Hope that helps!