It is DEFINITELY not the same, there is no selector slide, and the trigger plate itself is different, no notch.
From looking at your picture it looks like the trigger is set up for the second barrel, spur lever is on the other side of notched post.
I belive that you don't need the spring as there is no place for it to catch on the trigger housing. Look at notch in mine and where the spring would fall. Yours doesn't have the notch.
One other question, does you trigger fit in the left side of the slot in the trigger plate housing. (if it were double triggers, where is it?)
When looking at your pictures the trigger is in a different location than in my picture.
Last edited by JDW; 02/19/09 08:52 AM.