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AR15.COM
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12/13/2008 1:50:32 PM EDT
newbie question... can you use the same upper reciever for 5.56, 6.8, and 7.62x39, like you can with the lower reciever, or do these calibers all have their own dedicated uppers?
12/13/2008 2:50:02 PM EDT
[#1]
The upper receiver is the same, but your bolt, barrel, and mags are different.
12/13/2008 2:59:10 PM EDT
[#2]
Quoted:
The upper receiver is the same, but your bolt, barrel, and mags are different.


This...

If you want to run different calibers you are better off buying multiple uppers, unless you want to switch out barrel and bolt groups before shooting a different caliber, which would be... interesting...
12/13/2008 3:26:37 PM EDT
[#3]
alright, thats basicly answered my question.

i have on order a 20" 5.56 from del ton. i wanted a beowulf or 6.8 upper to swap onto to the lower for hunting. the reason i asked this question was because i couldnt find uppers designated for each caliber.

thanks again guys.
12/13/2008 4:03:29 PM EDT
[#4]
what are the pros and cons of the 7.62x51 VS 6.8?
12/13/2008 4:21:46 PM EDT
[#5]
There are dedicated forums right here that discuss AR10s.  The 6.8 is discussed in the other variants forum.

If you are thinking 7.62x51, you will need a different upper receiver, lower, and everything else; not even an AR15 anymore.
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