The Goa'uld staff cannon or Goa'uld blast cannon as it is also called is the main staple of the Goa'uld space armada. Their operating principles are fairly basic, L.N chemical or fission reactions or H.L.N fission reactions produce high energy plasma which is then refined and directed in the staff cannon mechanism. The bolt consists of E5 and non exotic energy/matter.
Standard Goa'uld staff cannons are not very effective against Asgard, Ancient and Ori shields. When enhanced with a basic understanding of Ancient kiron bond disruption technology they become effective against lower tier Asgard shields and mildly effective against mid tier Asgard shields.