TexasCHLforum.com

Here is one link, they are fond of carbines, but there is a lot of good info. I wish I would have read this before bying my AR. Browse their forums, there are some knowledgeable people who have teh credentials to back up their knowledge.

http://www.m4carbine.net/showthread.php?t=7355" onclick="window.open(this.href);return false;