I just assembled my ultimate coyote rifle Friday night in 6mm arc. Shoots .5-.75 ish with factory 108 eldm. Weighs less than 10lbs. It was exactly what I wanted when I imagined a perfect predator rifle..The shop up the road from me has an Alex Pro 6mm ARC.
I'm with you on the weight. I used to mess around with accurate ar10 rifles, but I don't even look at them now because they are so heavy. I was carrying a bergara hmr to predator hunt, and that is what lead me to build my ar rifle. That bergara must weigh 20lbs with ammo and optic and brake and sling. I was lugging it around and decided that I wanted something just as accurate but much lighter, and quicker follow up shots due to the coyote habit of traveling in mated pairs. I bought parts that were designed to reduce weight starting with the bullet upper lower set that are skeletonized. Mine doesn't weight 10lbs with the optic, (which was also chosen to keep weight low but do what I wanted), and a 10rd magazine. It is very manageable. Now, I'm not trying to change your mind, just telling you how I got where I am.I like the idea of an AR however they are out because of the weight? Too old and out of shape to pack one around.