A number of different flash suppressing designs have been used over the years. The simplest is a cone placed on the end of the barrel, which was used on the late-World War II jungle-combat versions of the Lee–Enfield, the Rifle No. 5 Mk I variant, intended for use in the Pacific (the jungles of Malaya). More modern solutions tend to use a "basket" with several slits or holes cut in it, as seen on the M16 and other small-bore weapons. Cone-shaped flash eliminators are also evident on the ZB vzor 26 machine gun, and on the turret-mounted aircraft machine guns of British WWII heavy bombers, which were used mostly at night.