QUOTE (12131 @ November 3rd 2009 6:20 PM)

Weight alone doesn't tell the whole story. It depends also on balance. Two rifles with the exact same weight can feel very differently, depending on where the majority of the weight is. Too much weight toward the muzzle end can feel much heavier than more weight toward the buttstock end.
Very true on that. Muzzle heaviness is a blessing at times and a curse in others. I find that a tad of muzzle and general heaviness aids in shooting but there are times that I do prefer a lighter overall package. I'm not real strong in the upper body area and tend toward the lighter side of rifles if I am doing off hand stuff but the second I can go to supported positions I like the extra weight.
All but one of my AR's have the round NM hand guard in place and the barrels are all the heavier profile with my 20 Tactical being less than a bull but larger than a standard HB configuration. Most IPSC stuff is run and gun but it is so fast that I don;t find the penalty for the weight. It is an issue for long range aspects as the extra weight pays huge dividends when you stretch the distance. There is also some advantage that in the up close and personal stuff in that a double tap with my big guns is quick and muzzle rise pretty minimal.
I do like a very light weight rifle if it is going to be a close urban type course with a max of 75 yards in the distance department. I have a 6X45 of the wifes that is down around the 7.0 pound mark and is ideal for run and gun. It has a very efficient compensator custom built for her that really allows me to let it all hang out even with the big bullets.
For a stocker AR set up I find the CAR format well balance as long as the trigger is not one that feels like a truck on gravel with no wheels. They are whippy yet allow just enough weight for consistent holding. Heavy breathing from a course does cause some sight issues but experience in slapping a trigger makes up for some of that.
I think the ideal weight for these rifles would be about 7 3/4 pounds in fighting trim. Just my ideas and far from gospel.
Greg