hammer

/ˈhæmər/

the part of a gunlock that strikes the percussion cap when the trigger is pulled

中文释义：击铁；撞针

The gun's hammer struck the cartridge, firing the bullet.

枪的击铁撞击弹药筒，发射了子弹。

He carefully inspected the hammer mechanism of the antique pistol.

他仔细检查了古董手枪的击铁装置。