Or that's what they are called, as they allegedly were used in The film.
Anyway, it made for a nice sightseeing trip when we still had the hire car. The scenery made up for the scary trip along a very narrow and steep road up to Cabo Tiñoso, just to the West of Cartagena. The steering wheel was getting more and more slippery as I was feverishly thinking ahead about what to do with oncoming traffic. But all went well, the car being tiny, fortunately, and we now have some nice pictures to show.
And if you really want to know all about the guns: http://www.discoveringcartagena.com/guns.htm