The term "Jungle Style" usually refers to the practice of taping or securing two gun magazines together, with one taped upside down while the other is inserted into the rifle. However, a rifle may also be jungle styled by using plastic divider or cradle in which the two magazines sit, usually upright. A Jungle Style configuration is used to speed up the process of reloading, since the other magazine is attached to the exhausted magazine, as opposed to being in a pouch, or other ammo storage unit. Also, some firearms manufactures have designed their magazines with studs that allowed them to mate together without the need of tape or clamps, such as the Heckler & Koch G36

Heckler & Koch G36

The Heckler & Koch G36 is a 5.56×45mm assault rifle, designed in the early 1990s by Heckler & Koch in Germany as a replacement for the 7.62mm G3 battle rifle. It was accepted into service with the Bundeswehr in 1997, replacing the G3...

 and SIG SG 550

SIG SG 550

The SG 550 is an assault rifle manufactured by Swiss Arms AG of Neuhausen, Switzerland...

.

Origins

The practice of "Jungle Style" magazines was developed during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 with the introduction of 30-round magazines for the M1 Carbine

M1 Carbine

The M1 carbine is a lightweight, easy to use semi-automatic carbine that became a standard firearm for the U.S. military during World War II, the Korean War and the Vietnam War, and was produced in several variants. It was widely used by U.S...

, M3 "Grease Gun"

M3 submachine gun

The M3 was an American .45-caliber submachine gun adopted for U.S. Army service on 12 December 1942, as the United States Submachine Gun, Cal. .45, M3. The M3 was designed as a more cost-effective alternative to the Thompson, optimized for mass production...

 and Thompson submachine gun

Thompson submachine gun

The Thompson is an American submachine gun, invented by John T. Thompson in 1919, that became infamous during the Prohibition era. It was a common sight in the media of the time, being used by both law enforcement officers and criminals...

. With the introduction of the 30-round magazine for the M1 Carbine. It was so common for the troops to tape two magazines together to speed reloading, that the U.S. Military introduced the "Jungle Clip". This spring-metal clamp holds two M1 Carbine 30-round magazines together without the need of tape. This practise was henceforth called "Jungle Style".