Back before I had the AK-Builder trunnion drilling jig, I needed a quick and easy way to locate where to drill the holes for the front trunnion. A fellow showed me the PostIt note method and boy was it simple and it worked.
The front trunnion is drilled for the rivets from the first kit so those holes need to be located and drilled on the receiver.
Simply take a standard PostIt Note, stick it to the side of the clean receiver and then rub a dirty finger or pencil lead over the PostIt to see the outlines of the holes appear. By the way, if the trunnion and receiver are clean, your Post-It adhesive will hold the note in place, which is what you want.
So line the PostIt note up on the receiver’s top and right edges.
Center punch the holes. I like using an automated punch so I have less to juggle.
You then have your holes to locate your drill.
Use a hole finder to be more accurate and/or start with a small bit and work your way up in case you need to move a little bit one way or the other.
That’s it. Easy as pie and pretty fool proof. Lessons learned for me was to clean the parts to protect the adhesive, make sure the edges are aligned and then that nothing moves when you punch each hole. You do one Post-It note for each side and you can write the trunnion serial number on it and safe the Post-It for future reference.
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