definitely get an Insecticon vibe from CA-04 (a praying mantis in particular, from the back kibble), and even from CA-03, what with his claws. Looking at 05's left ankle (on our right) it looks like a tail-rotor for a helicopter. Really, I have no idea who these guys could be, if in fact they're based on any existing characters.
unless...random wild guess here...BW Predacons homages? Warcry has a bit of Terrorsaur and Inferno in his coloration. 3 and 4 could be Scorponok and Waspinator. The other 2 have me kind of stumped there of course, but it makes as much sense to me as anything.
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Prowl, Astrotrain, Ramjet, Skywarp, Sunstreaker, Sideswipe, Blurr, Perceptor, GDO Wheelie and Springer, or 3rd Party Motobot Arcee, FP Springer, iGear Ratchet and Ironhide, City Commander (and/or Ultra Magnus), Starscream (deluxe) Coronation add-on, or Spike and Daniel in their Exo-Suits.