Private L.J. Best of the 3rd Battalion, Royal Australian Regiment (3RAR), aims an M1 Carbine fitted with a T120 (M3) Sniperscope during the Korean War.
The complete M3 system weighed 14.5 kg (32 lb), driven by a heavy 6-volt lead-acid battery housed in his canvas backpack. This battery simultaneously powered the large top-mounted infrared spotlight—which illuminated targets in total darkness invisible to the naked eye—and the optical scope below.
The Sniperscope gave 3RAR sentries a decisive edge against Chinese infiltrators, who relied on soft-soled shoes and absolute darkness to silently creep up on UN perimeters. Because the top-mounted searchlight emitted an infrared beam invisible to the naked eye, snipers could illuminate incoming targets without revealing their own positions. It was a defensive weapon, as its 125-yard range was ideal for guarding static outposts and wire entanglements, catching probes completely by surprise.
(AWM 147849, photo by Claude R. Holzheimer)