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7/6/2009 9:42:06 AM EDT
To build an AR rifle in  .243 can you use an AR-15 lower & upper or does it require a special lower/upper? What type of magazines would you use and where can they be purchased?
7/6/2009 9:45:17 AM EDT
[#1]
Just the other way around.  The .243 upper mates with the AR10 lower.  The magazine used is the standard AR10 magazine.
7/6/2009 9:58:17 AM EDT
[#2]
yep,  Dablues has got it right.   the .243 is basically a necked down .308 and is much too long for a standard AR 15 action.   But dimensionally, the cartridge is the same as the 308 sso A-10 mags can be used.

   sounds like a good project –––– the .243 would be an awesome AR platform cartridge.   Much more powerful than the 243, but without the recoil of the 308
7/6/2009 9:58:51 AM EDT
[#3]
Thanks for the help. What about 6.5's? I've heard their built on both AR15 and AR10 lowers??
7/6/2009 10:30:40 AM EDT
[#4]
Posted in mulitiple forums.
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