Hypothetically speaking, if the Sigma is so close to Glock in design and fuction, why has no one adapted the Glock trigger system to go in a Sigma frame. I am referring to the trigger, trigger bar, and trigger housing, connector, etc? If there was a trigger housing that was shaped to go in the Sigma frame, it would be a drop in fix for the Sigma's heavy trigger, theoretically. I am sure there are enough differences where there would have to be specially made specific parts for the Sigma, but there is enough Glock after market that I am surprised that no one has thought about this yet and brought it to market. I have been told that this is a waste of time and money. This is just my mind meandering with ideas.