quote:

Originally posted by sigfreund:
At one point, I believe it was when SIG started putting stainless steel slides on P220, they changed the width of the trigger from 8mm to 10mm to match the standard triggers long used in the P226, P228, and P229. The 8mm triggers have grooves in their faces (except for the rare 8mm “short” trigger which is smooth). The 10mm triggers have smooth faces. Older 10mm triggers lacked the hollows at the rear, but that was another later modification. Why, I don’t know except I assume it saved all of 10¢ in material per MIM trigger or something equally vital.

It appears that you have two 8mm triggers for the older frames, although I can’t see for sure the grooves in one. The width, though, is the key. Although I assume your pistol uses the wider trigger, if it won’t fit in the trigger slot in the frame, then you need to use an 8mm trigger.