Function: Bartender, weapons specialist
Weapons/Equipment: shoulder-mounted missile launchers, Neutron Assault Rifle w/ plasma blade attachment, X-18 Scrapmaker, bubble shield generator.
This dude, but with the color scheme of this dude:
Alt-mode: Cybertronian minesweeper
Function: weapons specialist, unofficial head of security
Appearance: Lock, but with inverted colors.
Alt-mode. Cybertronian minesweeper
Weapons/Equipment: Nucleon Charge Rifle (sniper rifle), shoulder-mounted rail cannon, Vindicon Laser Rifle (mid-range weapon that electrifies targets after the initial shot), energon mace.
Personality wise, Lock and Load are pretty much Jorge and Emile from Halo Reach, respectively.