Re: 20'' Barreled AR's..Need some advice
I personally think that a 20" barreled AR15 is a very good choice for a general purpose hunting/target rifle if the rifle is going to be chambered in .223. A National match profile barrel (.750 at the muzzle) is a good compromise in that department. Its stiff enough that long strings of fire will not effect point of impact while at the same time being light enough to carry when hunting everything from coyotes to ground hogs to prairie dogs.
Just make sure your barrel has a 1 in 8 twist. This twist rate will stabilize any bullet that can be loaded to magazine length. I personally have shot everything fom 40 grain rat pills to 77 grain match rounds out of my 20" Rock River Arms predator pursuit. its light enough to swing and heavy enough to be rock stable. It really is the best of both worlds.
.308 Howa 1500, varmint supreme. 24" .820 barrel, Roedale precision brake.
.223 Howa 1500, varmint supreme, 24" .820 barrel.
RRA 20" predator pursuite, Magpul PRS, ALG trigger,