Since I'm an obsessive lunatic, I've been working to catalogue exactly which characters in the Earth Wars mobile game use what models of weaponry. Unfortunately, I can't easily observe specific Autobots because I'm a Decepticon player. If anyone who is an Autobot is willing to help, that'd be greatly appreciated.
Here's the spreadsheet: link
Characters that carry multiple of the same model are noted. 'None' is for characters that lack a separate weapon of any kind, instead using either their fists or a mounted weapon of some form. If a weapon is modeled after a particular toy, it is noted below the weapon name.
Autobots still needed:
Sunstreaker, Bumblebee, Prowl, Cliffjumper, Grimlock, Mirage, Wheeljack, Blaster, Silverbolt, Skydive, Air Raid, Powerglide, Alpha Bravo, Firefly, Jazz, Windblade, Pyra Magna, Rust Dust, Jumpstream, Dustup, Skyburst, Stormclash, Slug, Huffer, Arcee, Sideswipe, Swoop, Ultra Magnus, Hot Rod, Hot Spot, Seaspray, Superion, Pipes, Star Saber, Hound, Optimus Maximus, Perceptor, Smokescreen, First Aid, Optimus Primal, Sludge, Kup, Drift, Laser Optimus Prime, Snarl, Cheetor, Volcanicus, Springer, Cosmos, Rodimus Prime, Sky Lynx, Warpath, Elita-1, Victorion, Tracks, Inferno, Tigerhawk
Decepticons still needed:
Razorclaw, Bonecrusher, Divebomb, Devastator, Bruticus, Predaking, Motormaster, Lugnut, Menasor, Cutthroat, Rodimus Unicronus