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Old 11-19-2006, 11:50   #1
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6mm AR........Where?

Anybody know of anyone that builds uppers in the 6mm AR? I know of one but he build match uppers for $2000!
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Old 11-19-2006, 18:22   #2
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If you are set on that particular chambering, I think there is only one doing it. But many are doing other chamberings that will give you similar, or better performance. John at White Oak, makes the 6 WOA. It's a 6.8 necked down to 6 mm. Olympic Arms and I came out with the .243 WSSM on the AR-15 platform a couple of years ago. It will give you several hundred feet per second on either of the other two.

The 6 x 45 is nice. It will give you about 30% more energy than the .223. The big thing is that you use the same bolt and magazine. I have been building and shooting them for about 15 years. Took a nice white tail with it this season. The 6 x 45 is no barn-burner, but it's extremely accurate, easy to load for and the components are easy to come by.
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Old 11-19-2006, 19:48   #3
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Thanks Dtech! The 6x45 is what exactly? And where can I find ballistics on the 6mm WOA?
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Old 11-20-2006, 05:04   #4
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The 6 x 45 is simply a .223 Remington necked up to 6mm. There is no fire-forming, you just take fired .223 brass and FL size them in a 6 x 45 die. The 6 x 45 started life several decades ago as a bench-rest round. I am quite fond of it and have chambered two bolt-action rifles as well as my AR's in it. It's been quite popular with predator hunters that want more knock-down power than the .223. Over the years I have built dozens of AR's on the 6 x 45 and have yet to have anyone not LOVE them.

The 6 x 45 will fall short of the 6mm AR and the 6mm WOA, but I think when you look at what you have to go through to get that little extra, you will find it's a case of "diminished return". The dies for the 6 x 45 are about 40 bucks, the dies for either of the others are going to run you $100-$150. You will need special mags with the others, as well as a different bolt, and expensive brass. The brass and magazines for the 6 x 45 are almost FREE!

I am building one of the 6mm WOA's, but more from professional curiosity than anything else. I have the ballistics for it at work, if you are interested. I think if the 6 x 45 isn't enough, you should jump to the .243 WSSM and get some real performance.
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Old 11-20-2006, 12:38   #5
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A LOT of places are making 6.8 SPC chamberings. Accuracy Systems Inc, DPMS, Samson Manufacturing, possibly Bushmaster (verify that), Talon Arms, Olympic Arms, and the list could go on.

A place I know of that is making AR-15's available in other 6mm chamberings (6 x 45, 6 PPC, 6.5 Grendel, and others) is Accuracy Systems Inc:

http://www.accuracysystemsinc.com/ar15_conversion.html
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Old 11-20-2006, 19:08   #6
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Dtech, I thought that's what it might be, I have a TC contender in a 7mm TCU same case just 7mm.
I would be interested in the ballistics of the 6mm WOA, Guess right now I am looking at the 6mm AR, the 6mm WOA and the 6x45 as a cheaper alternative. The .243 WSM seems a bit much for me although an interesting thought. I am also considering the 6.5 Grendal what do you know about that. Right now all I have is a lower and I would like to build it as a 6mm, .223 is last option. I appreciate your help.

Timlt, thanks! They seem to list prices for complete rifles; can you get the uppers in any caliber?
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Old 12-13-2006, 05:32   #7
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The 6mm AR is a 6.5 grendle necked to .243, may be a slight shoulder change, but it has a fast twist barrel for shooting long heavy vld's. Nothing wrong with the wssm, if you reload, it would be cheaper than the 6mm AR. The 6mm AR isn't worth the difference unless you shoot 600 yds.
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Old 12-19-2006, 21:53   #8
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Thanks, I am familair with the 6mm AR, and I am pretty much decided on the 6mm WOA from White Oak. The .243 WSSM while a good cartridge, it is not what I am looking for at this time. But the beauty of an AR is later if I want another caliber just buy the upper....maybe later.
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Old 03-03-2013, 16:01   #9
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I have a 24" heavy barrel AR in 6.5 Grendal, and Love it!!! Better than .308 ballistics in a AR 15 format! If you want to shoot 600 yrds. or better look up the stats on the 6.5 Grendal.
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Old 03-03-2013, 22:51   #10
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