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Posted: 3/20/2006 3:02:23 PM EDT
so i get my new kac ras for my 6721 it goes on no prob. i am checking to see how solid it is and there is some play so i look over the upper and it is between the barrel and the upper! so if i can feel a definate change between the upper and barrel something is way wrong. i got out my varminter and there is zero play. so i took of the ras thinking it was the handguards alas it is the barrel and the upper. i only have 1k rounds thru it. so should i take her down and tighten barrel nut or ship her off to colt? no wonder my aimpont or irons would't repeat very well
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