11-02-2017, 01:14 PM
I have used the nationalmtachshim on several AR's . Works well, takes 1/2 hour to do, and you can decide how tight you want the pin fit.
http://www.wheeldiamond.com/nationalmatchshim.htm
Clarence
http://www.wheeldiamond.com/nationalmatchshim.htm
Clarence

