My Colt AR-15

[68capturedAK47]

I see that you guys prefer RRA or Bushmaster unfortunately, but here is a pic of my Colt AR HBAR Competition Match Target
http://album.gunsnet.net/showpic.php?aid=469&uuid=68capturedak47&pid=4902

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I have an HBAR so is there any difference between the two? It looks like yours has no flash surpressor or bayonet lug. How about the barrel or other internal differences? Anyone. Please advise.