OK, have 2 Shadow 2's. Put the flat trigger and CZC disco in my black gun, wouldn't drop the hammer at all. Took flat trigger, trigger bow, hammer and disco out and put everything in my hardchrome gun and everything works perfectly. I'm thinkin' the frame may be out of spec on the black gun. The drop end of the disco hits the frame before the wings contact the trigger bar. Could it be as complex as not enough tension on the trigger bar spring? Having said all that the hard chrome gun works PERFECTLY! Pre-travel, over-travel and reset are as good as I've ever felt.