What for? Not trying to champion a round, just promote some discussion
I know it has its shortcomings, well shortcoming being knockdown power, but other than that I can't find anything I don't like about it. Some don't like the ballistics of it, but on the range, once dialed in properly I don't care if something has a flatter trajectory. For a carbine type rifle it does pretty good. Now if you want to have something else then I will agree with you, I wouldn't put a 5.56 into another "style" of rifle. That might be why I can't decide what to do with my other lower, because if I want to make a long gun, why go AR variant, pretty much it is only good for a sbr
What the .gov is doing with "improving" the current m4 before replacing it is stupid in my opinion, because the one we have now are just fine until the replacements get here