Try as you might, your attempt to come across as a "gun person" fails miserably.
AR15s make wonderful hunting weapons. Many companies make AR15s with specific features chosen for hunting. Here are a couple:
Typically they include a flattop upper receiver, a low profile gas block, skeletonized stocks, and a free-float hand guard.
The standard .223 round is more than sufficient for North American animals up to moose-size when using the proper loading: a 75grain BTHP. And many ammunition manufacturers offer .223 loadings specifically for hunting with an AR15. This is one of many fine examples:
Additionally, anyone with more than a passing knowledge of guns and AR15s would know that the platform does not only come in .223. In the last 5 years there has been a surge in popularity of upper receivers chambered in calibers such as 6.5 Grendal, 6.8 SPC and 300 Blackout. Additionally, the venerable .308 has been an option for AR-style guns for almost 50 years. While not being a necessity for using an AR15 to hunt with, these other optional calibers provide longer range hunting options.
But if you still believe that it's impossible to hunt with an AR15, please, whatever you do, don't tell the hundreds of people who posted pictures of their hunting ARs along with trophies in these two threads:
They would be devastated to find out that what they were doing was impossible.
As far as target shooting goes, the annual National Matches, held at Camp Perry, Ohio every summer since 1907, and widely seen as the Olympics of the shooting sports world, uses.... you guessed it: AR15s. And it's not hard to understand why: they're light weight, ergonomic, light recoiling, and cheap to train with (compared to other competition rifles).
And your claim that an AR15 is worse at self defense than all other things you think it's bad at.... get real! Nearly every SWAT team in the US, and NATO-allied special forces group in the world has moved to the AR platform, and those guys have the money and latitude to choose anything they want. After a brief love affair with various pistol-caliber carbines and bullpups in the late 90's and early 00's, they have almost all gone to the AR15.
There are plenty of semi automatic rifles that are much better suited for civilians - and even military use too but they're too expensive for outfitting an army.
The US Army could replace all of its rifles for the cost of about a dozen F-35s. Cost is not an issue that would hold the army back if there were a better rifle available.
The only reason they are so expensive now is because of the demand from stupid people who think Obama is going to ban them.
AR15s are cheaper today than they have ever been. There are over 100 companies in the US producing them, and a nice mid-grade AR can be had for under $600 today.
The next time you want to appear to be an expert on guns, and then denounce the most popular, most capable, most flexible gun ever made, for reasons that don't stand up to even casual examination, stick to the comment sections at Mother Jones or DU, where at least people like me will be banned for dissenting instead of being able to set things straight. Never thought I'd see Mobys on /.