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. The downside to the configuration is that it can increase the weapon's chance of jamming, as one magazine and its ammunition is normally left exposed to dirt and the elements. Some firearms manufactures have designed their magazines with studs or cradles that allowed them to mate together without the need of tape or clamps, such as the Heckler & Koch G36 and SIG SG 550; typically, these devices mount the magazines side-by-side and upright, so as to reduce the risk of ammunition falling out or becoming dirty.