Whenever Tio Sam is in the apartment to sell Ze Pequeno the weapons, he inquires whether or not Ze has seen a mini Ruger, which is the same caliber of an M-16, inaccessible in Brazil. Ze shows no interest or knowledge of the Ruger, though he is shown holding up one just like it whenever Buscape is taking photos of the gang.
In the scene where the tender trio are robbing the gas man and giving out the free gas, when the police arrive and the gang are running off, in the back ground there is a woman in a yellow dress carrying a big gas canister, yet in the next shot she is seen running in the same spot without the gas.
Buscapé is using a 135mm lens when he stands above a dead Lil Zé and takes his picture, but the picture that's developed is much too wide to be shot with a 135mm telephoto lens. We know it's a 135mm because, even though it does not appear in the subtitles, Buscape's boss identifies the lens in Portuguese.