Used Perazzi MX series drop out trigger assembly. For 12ga actions (not sure on interchangeability with the other frame sizes Perazzi offers). Pull/Pull configuration, bottom-then-top non selectable trigger (can be used with a top single if you remove the right cocking foot, or can be converted to top/bottom if you purchase a different "tree" or converted to internally selectable by purchasing a new inertia block & tree). Due to the 50+ year age range of Perazzi mfg, minor gunsmith fitting may be required. S/N is 41427 Ultrasonically cleaned and reoiled. Appears to have the original hammer spring for the top barrel, and a later replacement spring for the bottom barrel. $500 shipped. Interesting trades considered, esp a left hand PFS.