Sear modification to prevent interference with the disconnector

[niemi24s]

This is from a 40+ year old article in the American Rifleman detailing what was done at Springfield Armory (the Army one) to build guns for the National Matches:

http://i129.photobucket.com/albums/p232/niemi24s/P086160004c.jpg

Note how this method leaves the outer portions of the legs intact to avoid (I think) what Tuner mentioned.

Regards