What is the best carbine length quad rail?

[Th3Revreant]

Im looking to replace stock handguards on my DPMS ar15 and dont know much about quadrail systems. I have the Knights armament quadrail on my govt m4, like it alot but they seem to run pretty high on the price. Any suggestions on the best rail for the buck?

[Caeser25]

blemished ones are cheaper, used ones on ebay are cheaper as well. troy gets good reviews for drop ins, dd has a new drop in thats lighter then kac and cheaper. imho dd lite is the best for free float.

[Th3Revreant]

thanks for the input, ill keep my eye out for some used ones.

[NCPatrolAR]

http://m4carbine.net/showthread.php?t=58243