Re: Rate these 223 semiauto's
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: WICKEDFISH</div><div class="ubbcode-body">I have never had problems with my Bushmaster or DPMS, they are not LWRC or POF, LMT but they are pretty darn accurate for an out of the box rifle. </div></div>
I've seen more bushmasters and DPMS rifles fail than all the rest of the makes I've encountered at patrol rifle classes combined. If you're buying a rifle for a plinker/range toy, they're fine. Otherwise, avoid them like a spider with herpes. Hell, I haven't had to work on a bushmaster since . . . . . well it's been days. The last one I went over had: broken takedown pin, improperly machined extractor, no staking on RE nut, grossly inadequate staking on carrier key, wrong extractor spring, wrong insert for extractor spring, and non f-marked FSB with the wrong height front sight post making it very hard to zero. But, hey - that's just eight inadequate parts on one rifle. But at least it malfunctioned constantly. The guy save money on it, and it's just as good as Colt.
Now to the OP
I have used the AUG - kinda neat, but the trigger is very "different" - don't want to say it sucks, as I'm sure one can get used to it. Don't like the manual of arms (reloads very slow and awkward to me) and the inability to transition from shoulder to shoulder because of ejection port location.
I shot the Sig 556 a bit at the last patrol rifle class I helped teach. I had built this thing up in my mind, and was a bit disappointed. First off, the damned thing cut me when I worked the charging handle because it had about 4 acres of rails on it, and I just worked it like an AK (which is what the operatign system reminds me of). Second, the freaking front sight is about the width of a popsicle stick. It's huge.
To make up for the ass-blowing front sight, the rear sight sucked donkey crank. Just terrible irons on the thing. Then they also included a cheapo copy of the Aimpoint T1 that is something I'd expect to see on an airsoft gun. The rifle was heavier than almost all the other 5.56 rifles there, but managed to have more felt recoil. The trigger was good, though. So, if you don't mind a crappy rifle built around a decent trigger for a lot of money, it's all you, man.
No experience with the Robinson or FN, but they haven't taken over the firearms world so I suspect they're not all that and a bag of chips. If I get to put either through their paces I'll come back and edit this. But the FN looks ginormous to me, and it would seem difficult to clear a malfunction with the bullpup setup and ejection out the front.
Of your list, a GOOD AR would take like the top 20 slots, then the Sig, then the rest in no particular order.