Osisi is the general Edo word for guns. Osisi were initially introduced to the Benin Kingdom by the Portuguese from the late 16th century onwards and were again traded by the Dutch from the early 17th century (Osadolor 2007, p. 80). Osisi are usually represented as being carried by, or positioned close to, figures identified as Portuguese based on their attire and hairstyles. There are a small number of exceptions, including two wooden carved examples. One is a possible chair seat where a figure is holding a gun upright, and another is a carved wooden panel where a gun is shown next to an Edo dignitary. Additionally, a more recent work produced by the artist H. I. Erhabor includes an Edo figure holding a gun.

These weapons quickly became a potent symbol in the work of artists from the royal guilds, representing the Ọba’s military might, expansionist policies, and the wealth derived from foreign trade (Plankensteiner 2007, p. 208). Three different kinds of European-manufactured guns were used by the Edo army: the flintlock, the wheellock, and later the matchlock, which was used from the 1600s until around 1850. However, Ọba Akengbuda became increasingly wary of Edo dependence on European firearms and encouraged the production of firearms by the Igun Ematon. During the 19th century, the trade in firearms from Europe resumed, with Dane guns, so named because they were made in Denmark. However, from 1890, European imperial powers banned the trade in firearms to West Africa (Osadolor 2007, pp. 80–81).