3/10...I have a way to go!
What do you believe is missing from the list? Maybe the M1 Garand? Or possibly a 1903 Springfield?
The list seems very "current". It needs a wider base of historical rifles that made real contributions to culture, life, and liberty. IMO.
For me, there has to be:
The Musket (a black powder, patch and ball, barrel loaded)
1873 Winchester in 44-40, 38-40, or 32-20;
A Winchester single-shot (caliber unimportant);
A Sharpes Rifle;
A Spencer Rifle;
M1 Garand;
And four from his list of the more current rifles, definitely including the AR-15.
You can't really appreciate the development of rifles, and the changes from black powder musket design, through breech loaders, to current technology until you have loaded and maintained these rifles, and appreciated the developments of each successive leap forward in design.
So my list covers the rifle from an earlier period to present. Just MHO.
saa.