3mr trigger when installed correctly in a DD and Aero lower doesnt like fuctioning. Will flip to all 3 positions but will not release the striker. If you back out thw front pin just so its resting on the screw and not the bar it woulds great! But that is a temp fix and i dont have time or knowledge to fiddle around anymore. $250 OBO. Prefer to sell to a gunsmith or someone who knows how to run it properly. Send me a txt. 8oI822797E