In this case, it's a stopper pistol.
(click ad for closer look)
The copy starts: China holds the current world record of executions with executing 1,010 people of 1,591 confirmed executions worldwide (the language is awkward because this is a translated version of the ad via BBDO in Hungary). Amnesty International has been all over the People's Republic in the year leading up to next month's Olympics—though the organization says they had nothing to do with these wonderfully art-directed award-winning AI Beijing ads. All these examples just go to show how easy (and fun!) it is to combine killing and sports into a tidy little print ad.