From what I remember of Phnom Phen back in 2001 the options were.
Handgun - $10 per clip
Assault Rifle - $20 to $30 per clip
Machine Gun (M60) - $100 for 100 rounds
RPG (looked like a chinese knock-off, really rough) - $200
I just went for the Assault rifle (AK47) and it kicked like a mule!
got a good grouping though
