The DeadZone pictures are a pretty good indicator of what the infantry weapons look like, I think, especially given that they're the "new model" Enforcers. For convenience:
Heavy Rifle:
Rifle and Missile Launcher:
Pistol and Assault Blade:
Engineer and Sniper:
Tactical Flame Unit:
Can't tell if this is the Burst Laser or just the flame unit from another angle, but it's the best I could find there:
I believe that's the list of infantry options available to the rank and file Enforcers, at least.