Image credits

Hero: Supporting troops near Hooge, Ypres, 5 October 1917. Frank Hurley, Australian War Memorial E00833 (public domain)
The Old West: "The Cow Boy", Sturgis, Dakota Territory, c. 1888. John C. H. Grabill, Library of Congress (public domain)
The First World War: Machine gunners near Bapaume, France, 17 March 1917. Australian War Memorial E00344 (public domain)
The Second World War: An Australian with an Owen gun, Sanananda, Papua, 22 January 1943. Clifford Bottomley, Australian War Memorial 014185 (public domain)
The Cold War: 7RAR soldiers and an RAAF Iroquois, Operation Santa Fe, Phuoc Tuy, 11 November 1967. Michael Coleridge, Australian War Memorial EKN/67/0141/VN (public domain)
Winchester Model 1866: Credit to be added
Colt Single Action Army: Credit to be added
Short Magazine Lee-Enfield Mk III: Credit to be added
Mauser C96: Credit to be added
Thompson M1928A1: Credit to be added
M1911 pistol: Credit to be added
AK-47: Credit to be added
M16A1: Credit to be added
Beretta 92: Credit to be added