I am going to put a flat top upper on my Armalite for some coyote hunting. Looks like Model 1 is the only company that has what I am looking for, 24" standard weight barrel. The bull barrel models are just too heavy in the 24" length. Question is which chamber? I usually shoot PMC, Winchester white box or S&B. Are these rounds .223 or 5.56? I realize there is not much difference. Should I get the .223 chamber or 5.56?
Bushmaster and RRA are just a little too pricey for me. Are there other options in the $300 price range?

I'd  go  for the  5.56,  also  chrome lined barrel and chamber   for reliability  & endurance.


TG