1945年,英国的枪械专家在开发新一代步枪武器时,提出了无托结构的概念。这种新型结构能够在不改变枪管长度、有效射程和弹道特征的情况下,缩短枪身长度,减轻枪械重量。更重要的是,无托结构使枪身重心偏后,单手持枪也很稳,如此一来既能缩短瞄准时间,又提升了命中率,可谓一举两得。 In 1945, British gun experts proposed the concept of underactuated structure when developing a new generation of rifle weapons. This new structure shortens barrel length and reduces gun weight without changing barrel length, effective range and ballistic features. More importantly, no care structure so that the gun body center of gravity bias, one hand guns are also very stable, this will not only shorten the aiming time, but also enhance the hit rate can be described as double benefit.