Bond also only needed one, technically.
^this
Therefore the proposed henchmen idea is really good in my opinion.
Another idea would be the following:
since Bond would only have needed one bullet, you can ramp up the damage for the PP7 via the gamemode and players may select their role: playing as Bond will be easier (since they can fire more shots in succession) but only reward one point per kill, while playing Scaramanga will be more difficult but also reward more points per kill. (one could even think about killing streak point rewards additionally)
Note: these ideas don't have to be used, because they're only proposals, but they COULD be used for FUTURE events.