The State Protection Group (SPG) is part of the Counter Terrorism & Special Tactics Command of the New South Wales Police Force and was established in 1991 to deal with extraordinary policing responses. The SPG directly supports police in high-risk incidents such as sieges with specialised tactical, negotiation, intelligence and command-support services. The unit also provides rescue and bomb disposal support, canine policing, and armoury services.

The Heckler & Koch UMP is a submachine gun developed and manufactured by Heckler & Koch. Heckler & Koch developed the UMP as a lighter and cheaper successor to the MP5, though both remain in production. The UMP has been adopted for use by various countries including Brazil, Canada, and the United States. A small number of UMPs chambered in .45 ACP were officially purchased by the 5th Special Forces Group of the United States Army Special Forces, with some of the weapons seeing limited service in the early years of the Iraqi insurgency, making them one of the more popular submachine guns being deployed by the U.S. military personnel in recent conflicts around the world.