Spencer (1860). The Spencer was the first machine gun to be made. It fired seven shots per fifteen seconds.
Next was the Winchester (1872). The Winchester was a shotgun rifle with two chambers for repeat shooting. Only problem was reloading took time. This was the time that bullets were made with powder in them. But then we became smarter and wanted it smaller and carry more ammo. And thus, the average Handgun was made (1892-Today). It was a multi-shot pistol with high distance. Although there are many forms of it, the principle stayed the same.
Technology has been made to help during the time, and although it hurts us sometimes, it shaped our world into what we have now. So cherish the technology that was made, and when you feel lost, use a rock.