The M2HB is an American heavy machine gun fitted for the .50 BMG cartridge.Tatmadaw boat, with an M2HB mounted on the deck, being manned by one of the pirates. The pirates attempt to get Sarah Miller in exchange for passage, and when all attempts at negotiation fail, Rambo pulls a hidden Colt M1911A1 and kills all of the pirates, with the M2HB gunner second. Rambo later spots the Tatmadaw coming downriver and douses the boat on gasoline and burns it down so the Tatmadaw don't know what he has done. Rambo espescially douses the M2HB, so it could be destroyed quickly in the fires. The ammunition belt on the M2HB explodes almost immediately, causing a good part of the boat to go down with it.