Strictly speaking, you shouldn't post links to retailers of airsoft guns outside the restricted sections. (The link below is a wholesaler, they don't sell to the public.)
http://www.palcosports.com/catalog_p...cfm?prod=18975
That actually looks more like a CYMA given the white marking and US pricing. Note that for the rest Palco says "King Arms" but not that one.
If you look up the same model (M4 CQB RIS) on the King Arms website the only Colt marked one does not have white markings, and is the "Elite" series (certainly more expensive).
So now the question is: How good/bad are CYMA M4s? I don't know.