Okay, I get it now. I apologize, what I said earlier was bad advice. Best advice you're gonna get follows.
Before I go any further, OP, are you interested in actually learning marksmanship fundamentals and how to shoot groups within the limits of the weapon at such and such distance, or are just interested in building something that closely resembles whatever you unlocked on COD?
I'm being serious here, because there are two completely different answers.
If shooting is your thing and you're interested in #1, then I'm really thinking you need to just get something like a Colt AR15A4. Collapsible stocks and other junk will just fuck you up right now. Plus it's a good rifle, it's not junk, you can bet your life on it and I promise it'll do you better than a collection of shit. It'll make a fine rack rifle too once you wear the fucker out, and it'll do everything you need it to do, ask any Marine or pre 9/11 grunt. This is the one, $1049, ain't it sweet? A Marine or grunt would've ate your breakfast to get his grubby little dickbeaters on something this nice:
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A bunch of ammo, M855 will do fine but if you can get better for less do it, print off pages for a good NM dope book, a shooting sling, a leather glove and a heavy jacket (whatever you have will work, if you find NM is your thing you can get the hi speed shit later) join a range club that offers NM shooting on a KD range, pretty sure they have one in or around Spokane, and SHUT UP AND LISTEN to the old timers there. Maybe get a good book on fundamentals and practice that.
If you're wondering what trigger, you're not listening. It comes with one. If you don't like it, keep practicing. It'll get better, I promise.
If you wanna learn marksmanship and get good at shooting these things, then that's the best advice you're gonna get, whether you like it or not. It's a fact and anyone on here that knows their shit, including the site owner, would agree. Unless he said start with a bolt .22 and then I gotta say I couldn't disagree.
Then by the time you learn all this, when you do upgrade and take the advice on an SR15 or HK or cut rifle this or that, you'll be able to appreciate the difference. It'll be like going from a Chevy to a Ferrari. But you gotta learn the fundamentals, gotta learn to shoot the weapon to its limits. Otherwise they'll all just be Yugos to you and it won't really matter what you get.
If it's the other answer #2, and you just want some Gucci shit, then drive on, I can't really help. 99% of the stuff sold is just junk or cosmetic crap anyway. Because you've turned down far better advice simply because "it's not CHF" or "BCM such and such ain't good enough". Pretty sure you ain't good enough to tell the difference between a Krieger cut rifle vs. a CHF whatever the fuck.
You can be though. If you'll shut up, listen, and stop arfcomming it on the 'Hide. And FWIW, you can get bad advice here too.
Don't take this the wrong way. See, BTDT, I bought a goddamn 37mm flare launcher and put it on my perfectly fine preban Dothan AL police issue PWA AR I got for $600 with ten mags back in 1999 --that's a big fucking deal dude. That's like putting a brand new Honda engine --inside a mint disco era Masserati. It's dumb. And it sure as shit didn't make me a better shooter. But I did it. Don't be "that guy", learn from my mistakes if you can, that's what we're here for.
Good luck.