I know ANZAC forces aren't going to be in, but they had some of the coolest weaponry.
Owen Gun:
F1 submachinegun:
Sawn off L2A1 'female dog' with XM148:
Parker Hale 308:
Other weapons not as intersting are:
- L1A1's Sometimes with an added grip, or sawn off
- Sterlings, both loud and silenced
- Bren guns!