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This comes up very often.  Search is your friend.

For most people you won't notice the accuracy difference between Chrome and Non-chrome.  It's harder which makes the barrel more durable, less susceptible to fouling/rust.

Milspec is chrome lined bore and chamber, decide for yourself if that's what you are looking for.

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Can you tell us about what sort of shooting you do now, and what you envision doing with this rifle?

I shoot very low round counts (about 50) and don't notice a difference between cleaning a CL and a regular barrel.

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Where's the search button?



I hope to compete in competition(and probably not win D:) and maybe varmint hunt, although currently, I just plink

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Ever considered high power?
http://www.ar15.com/forums/f_9/14_High_Power___DCM___CMP.html

For plinking (and varmint hunting) I would get a heavy barrel for the heat capacity and accuracy.  I have a gov contour barrel that gets fairly hot within a string of 10 shots.
Most heavy barrels you will find are stainless, bushmaster and rock river offer parkerized barrels if you should like.
Since varmint hunting uses a high magnification scope you won't notice a front sight base, unless you hate the look I'd leave it on.

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I believe that the reason that its cheaper is because the handguard isn't free floating. w/ free floating handguards, it looks like it amounts to the same as DPMS, I also don't see that a 1:8 barrel is specified on that DSC link. By commercial or mil-spec holes, I've heard that some manufacturers have changed over to different sized pins and holes for them along with a different sized buffer tube.

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Looking at the NRA rulebook for high power, does a quad rail flat top rifle with flip up sights count as a service rifle?

Also, do stripped Olympic Arms lowers have commercial or mil-spec holes?



considering just getting a kit instead of a completed upper + building my own lower

does anyone know of something like this with a 1:8 twist, but still a kit?

http://www.dpmsinc.com/store/products/?prod=5597&cat=1532

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WAG stands for Wilson Air Gauged barrel, its a 1/8 SS barrel. Did you even look at the handguard options? There are many different free floated options that keep you well away from the DPMS price. Colt was the only manufacturer to use different FCG pin holes and they no longer do it. The hole for the buffer tube which is technically the RECEIVER EXTENSION, is the same on every lower out there. The tubes themselves are different sizes, not the holes.

ETA: And the one I showed you is assembled. If you've never assembled one before the tools you'll need are a bench vise, armorers wrench, multiple pin punches, and a small hammer. These will run you probably $200.

ETA2: Oh yeah, and a torque wrench. Add another $100.

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Recently I believe they okayed quad rails and A4 rifles. It still needs to be a 20'' with a carry handle. No one seriously shoots this set up, but it is now service rifle legal IIRC. Really, the best bet is to pick what you want first and then buy a second rifle. If you are interested in NRA competition look up the us rifleteams forums. If you want to shoot long range (600 yards) then you can use virtually anything you want.

If you are interested in 3-gun, we have a forum here for that too. It really depends on what you want to do.
 

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I want to assemble my AR15(or at least the lower) so I know the internals well, the only handguard that specifies free float is $280+
As for the torque wrench, would an electric drill work? Those things can tighten to a specific torque.
I have a tool that can be used as a punch, and I believe I have a bench vice somewhere.
Tools are not really an issue.



Thanks, I'll look into a rifle that I can use in high power in a while.