I got the 1340. I called Williams and told the technical dept about their directions. The guy I talked to had the same sight on a T/C Hawken. But his tang had the third hole. We discussed the directions for the 6-48 hole vice the 8-40 screw supplied (the 8-40 is to replace the plug screw for the 3 hole tangs). He was totally unaware of this and said he would get right on that issue. He was very apologetic and seemed sincere so I wasn't too critical. If he would have been a smart a$$ I probably would have been a bit more explicit in my complaint. But I kept my cool and told him that I wasn't complaining but just giving them a 'heads up'. Even though my trip to the gun shop is a 70 mile round trip which I have to make again tomorrow to get my tang re-drilled and tapped.