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1/5/2010 7:22:22 PM EDT
I'm building a upper for a 6.8 rifle. Are there any difference between the 5.56 upper and the 6.8 upper. I don't see a difference and figure its just the barrel and bolt. Thanks!
1/5/2010 7:29:33 PM EDT
[#1]
The upper receiver is essentially the same as most current production uppers -  you should buy an upper with M4 feed ramps for your 6.8 barrel (and you should make sure that your 6.8 barrel has an M4 extension).
1/5/2010 10:20:46 PM EDT
[#2]
The above is correct. Get M4 for both the above. Fir the rest the only difference is barrel, bolt and mags.
1/6/2010 5:55:51 AM EDT
[#3]
Thanks for the info!
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