Quote:
Originally Posted by MurphysLaw
There IS a difference between .223rem and 5.56 NATO, a quick google search will give you a plethora of articles explaining the difference. From my understanding 5.56 NATO does produce higher pressures in the chamber than .223rem. That being said, most AR varients will run both .223Rem and 5.56 with no issues. I've ran 1000s of rounds of each through my RRA AR-15 and never had a problem.
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Thats pretty much what I am wondering due to the fact it is such an old model... This thing is probably early 80's at its youngest... Also, as with any rifle, I wonder about seals and gaskets and what-not... I know the springs have been replaced recently, not too sure about anything else...