AR10 build.

Don't know what you are looking for, but if accuracy is a consideration check out Lilja barrels. I am contemplating the same. I would like as light as possible and a tack driver.

The vast majority of 308 ARs use the KAC/DPMS pattern. It's quicker to list the companies that don't use this standard - Armalite and Noveske. Both of them use the AR10B standard.

Some of the better companies producing receiver components are KAC, Georgia Precision (GAP), and MA Ten.

^^^
Lots of options to choose from with that platform.

I have experience with both types and both are good.

I wouldn't get too hung up on name brands as receivers are pretty much just a housing. But a matched set so they fit tight. I use a Remington r25 upper and lower and they are as good as anything. I have a Lilja 24" .95 barrel and it shoots just under Moa with factory ammo

http://308ar.com/lowers.htm

find out which uses the cheapest mags

It's quicker to list the companies that don't use this standard - Armalite and Noveske.

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Can't say for sure, but the Armalite AR-10A uppers may be compatible with KAC pattern lowers, since they were designed to use the Pmag.

I actually prefer the Armalite 10B pattern myself, but they were wise to offer a KAC/DPMS/Pmag compatible version.

There's a couple of really good write ups on AR-15.com. Tons of info, specs, prices and compatibility.

Georgia Precision (GAP)

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G.A. Precision (GAP), not Georgia and unfortunately not located in Georgia either. :-(

GA Precision is based outa KC,MO.
http://www.gaprecision.net/

Here is another link ya might be interested in concerning 7.62x51mm AR types.....

http://www.fulton-armory.com/FAR-308-Titan.aspx

Can't say for sure, but the Armalite AR-10A uppers may be compatible with KAC pattern lowers, since they were designed to use the Pmag.

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They are compatible but it really doesn't have much to do with what mags they use. One of the biggest differences between an Armalite upper and a KAC/DPMS style upper is in how the rear of the upper receiver is cut. The KAC/DPMS is done on a curve like an AR15, the AR10 is a 45 degree angle.

The result of that is that an Armalite upper can theoretically be put on a KAC/DPMS lower however you have a pretty big gap at the back of the upper receiver because it's a completely different shape from the lower.

MtnCreek said:

G.A. Precision (GAP), not Georgia and unfortunately not located in Georgia either. :-(

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My bad. Thanks for the correction