A complex of proteins that permits the translocation of proteins across the outer membrane via a transmembrane pore, formed by a beta-barrel, into the extracellular milieu or directly into host cells; the secreted proteins contain all the information required for translocation of an effector molecule through the cell envelope. The type V secretion systems includes the autotransporters (type Va), the two-partner secretion system (type Vb) and the Oca family (type Vc).