The only gauge that is NRA-legal is the type with hanging weights. I have owned a Lyman electronic gauge for about a year, and for my purposes it works fine. I like the ability to average several pulls to get a representative number. I don't like the fact that it won't read above 12 lbs., but I don't have too many guns that have trigger pulls that high. My carry piece, however, is a j-frame S&W that has a pull exceeding the gauge capacity.