Which AR to buy? If you end up with 20 responses, you'll probably end up with 20 different choices. LOTS to choose from. I am still fairly new to ARs, but I learned a few things early...
1 New Colts are dramatically overpriced, and not better guns. Don't bother. (Ignoring the old collectables; I'm assuming that's not your primary motivation at this point.)
2 If you want immediate gratification, get one built up. If you can use a buddy's gun a few times to figure out what you like and don't like, you will be better off in the long run ($) to build one up yourself. Plus, it's a fun project. I got a stripped RRA lower for $120, and then ordered a lower parts kit from RRA to build it up. Got a Vltor stock off eBay, and that was that. So, now I have a complete lower set up and waiting for its upper, which brings me to #3.
3 Caliber - 5.56/.223 is the 'traditional' caliber, and is more plentiful/cheaper than other calibers, although the prices do seem to be rising daily as more stuff goes overseas for use in conflicts... There's 6.8SPC, 6.5 Grendel, and a host of others. I encourage you to Google this, but I think you get the point here...
4 Gas vs Piston? - If you've researched it this far, no doubt you already know that cleaning a really dirty direct-impengement gun is a rather large pain in the ass. DI guns are certainly more plentiful, though, and cheaper. That said, it wasn't long ago that a piston-AR was not much more than a neat idea, and now you've got HK, POF, LWRC (my choice) and Bushmaster making piston uppers, and those are just the ones I'm aware of. I've heard that Barrett is working on one, too. Well, where there's smoke, there's fire. If you're not up to speed on what a piston gun represents, LWRC (lwrifles.com) has a good schematic that outlines the basic processes, and the differences.
Then the more general question: Why an AR vs any other rifle? Again, lots of answers, but for me it's this: If I'm only going to be able to grab one rifle and a bug-out bag on the way out the door if something really bad hits, I need that gun to be as reliable and versatile as possible. With an adjustable stock, too many rails to count, and a plethera of toys to mount on them, it's hard for me to think there's a better bet out there. Plus, they are so ubiquitous now, you can get parts damn near anywhere.
How's that for a long-winded response?
