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Recently, I had an arcane problem with my latest project. A lot of people emailed, PM'd and responded with the same incorrect assumptions. I did some research and I can see where the problem comes from. There is a LOT (almost too much!) info about how to put an AK together. Most of these guides merely repeat the same info. They tell you what to do but not why. I found this at :
When Pulling the Trigger:
The complete trigger and disconnector assembly pivoting on the trigger pin (Point A) allows trigger/sear surface (Area F) to start to disengage from the hammer engagement (Area K) . This is the first stage of the trigger pull. The weight of the trigger pull of the first stage is determined by the angles of the engagement surfaces and the power of the hammer/trigger spring. The trigger can only be pulled in the first stage until the hammer surface (Area I) contacts the disconnector face (Area H) . At this point, the second stage of the trigger pull begins. The additional weight of the second stage of the trigger pull is determined by not only the engagement surface angles (Areas F and K) , but the power of the disconnector spring. When the trigger is pulled threw the second stage, the trigger/sear (Area F) is disengaged from the hammer hook surface (Area K) allowing the hammer to go forward.
Granted, this is for an adjustable 2 stage trigger but the complete sequence is the same. I used this article as it had the best drawings and you can see what the purpose of the adjustments are and how it affects the operation. I have more if you want to see them.
As I said before folks, the math doesn't lie. Transpose the dimensions to the articulation and you have the answer. It's all in the numbers.
When Pulling the Trigger:
The complete trigger and disconnector assembly pivoting on the trigger pin (Point A) allows trigger/sear surface (Area F) to start to disengage from the hammer engagement (Area K) . This is the first stage of the trigger pull. The weight of the trigger pull of the first stage is determined by the angles of the engagement surfaces and the power of the hammer/trigger spring. The trigger can only be pulled in the first stage until the hammer surface (Area I) contacts the disconnector face (Area H) . At this point, the second stage of the trigger pull begins. The additional weight of the second stage of the trigger pull is determined by not only the engagement surface angles (Areas F and K) , but the power of the disconnector spring. When the trigger is pulled threw the second stage, the trigger/sear (Area F) is disengaged from the hammer hook surface (Area K) allowing the hammer to go forward.
Granted, this is for an adjustable 2 stage trigger but the complete sequence is the same. I used this article as it had the best drawings and you can see what the purpose of the adjustments are and how it affects the operation. I have more if you want to see them.
As I said before folks, the math doesn't lie. Transpose the dimensions to the articulation and you have the answer. It's all in the numbers.
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