在第二次世界大战中,以高射速进行短距离猛烈射击的冲锋枪大量地投入使用,与其配合使用的步枪则主要对中远距离目标进行射击。但是非自动步枪的射速低,难以做到对目标的快速射击,虽然半自动步枪的使用使这种情况有所改善,但是士兵所需要的是能够进行连发射击的步枪。为了填补冲锋枪和步枪之间存在的200—400m之间的火力空白,一些新型的枪支和弹药出现了。1941年,德国人首先研制出7.92×33mm中间 During World War II, submachine guns that were fired at short firing rates at high firing rates were heavily operational, while rifles used in conjunction with them were mainly aimed at long-range targets. However, the non-automatic rifle has a low rate of fire and it is difficult to achieve a rapid target fire. Although the use of semi-automatic rifles has improved this situation, what the soldiers need is a rifle capable of firing in series. In order to fill the blaze gaps between 200-400m between submachine guns and rifles, some new types of guns and ammunition appeared. In 1941, the Germans developed the first 7.92 × 33mm middle