Is this Trigger Production Legal

[alma]

I do not own any Glock, but am intrigued by this topic. In short, as long as the below three conditions are met, the trigger should be legal -- right?

(1) No external, visible modification

(2) Trigger safety should be preserved and function

(3) External, visible trigger position, when the gun is in battery, should be same as that of a stock trigger

I don't think #3 is necessary.

I agree with the others. If I see from a demonstration video that the trigger safety engagement which all happens external to the gun has been significantly modified I did understand hop it could not be considered an externally visible modification.