An Acceptable Balance Between Weapon Weight and Size

Apart from the changes that took place in the method of ignition, the evolution of portable firearms may also be understood from another point of view. Given a certain level of development, the power of any technological device is a function of its weight and size. In the case of the arms in question, too, what mattered was finding an acceptable balance between weight and size, a balance which determined tactics, and was in turn determined by them. Early firearms were very small but, in order to add power, increased steadily in size. This development meant that, whereas the sixteenth-century arquebus could still be couched in a soldier’s arms while it was fired, the early seventeenth-century musket no longer could. The weapon, weighing 12 to 14 pounds, had to be supported by a forked rest. This impeded mobility and made muskets difficult to use on the offense—an unwelcome development. The bayonet, invented around 1660, would have been useless unless the musket was lightened to the point that the rest could be discarded and the weapon swung in the arms of an average soldier. This was duly done, even at the cost of some loss of power. Not everybody liked the change, and the Marechal de Saxe during the middle of the eighteenth century was calling for the introduction of an amusette, an even heavier musket which would have to be pivoted on a wall or attached to a cart. Thus the different qualities demanded of the weapon clashed and interacted, pushing development along.

— Technology and War, Chapter 6

Emphasis mine.