The would be mass killer back when the 2nd Amendment was conceived....

[haele]

14. During that era, a soldier or militia member who trained regularly could load and fire 2x a minute.

The really good musketeers could load and fire 3 times a minute.

Muskets of the Revolutionary/late 18th century up through the early 19th century period looked similar to a mid-sized rifle; not those big bell-mouthed mini-cannons found in the 16th century, but a flintlock stock with a long barrel to help intensify the force and better direct the trajectory of the ball before it left the barrel. Rifling for a firearm barrel is a fairly modern invention - off the top of my head, I believe it was the late 1820's...certainly post Constitution and the 2nd Amendment. I seem to remember that rifles were not commonly available to the general public until well into the 1860's/1870's.
But even with an early rifle, you still had to take the time to load with powder, wad, and ball (talk to a black-powder or Civil War re-enactor sometime) until the percussion cap became standardized in the 1830's for specialty rifles. Hunters and trappers typically used black powder because they couldn't afford those specialty rifles that used percussion cap rounds. as So even during the Civil War, most infantry men could only fire 2, 3 times a minute.

A bayonet was good for a short distance/hand-to hand fighting weapon, sort of like a short spear or lance. It allowed you to use your musket either as a staff weapon to keep an enemy with a sword or dagger off you, or as a spearing/slashing weapon.
You only fixed your bayonet after the enemy got too close to reload the musket and continue fire. Otherwise, you'd f'up the balance of your musket (or rifle) and risk wasting precious powder and shot.

Pistols, now. At the turn of the 18th century, anyone who could afford a pistol usually got two to four pistols - that typically needed to be pre-loaded if the person was going out. There was a reasons pistols were used more for dueling or when going out looking for trouble than just "for home or day-to-day protection". 18th century pistols were very fiddly and prone to going out of balance or throwing off the pistol's aim if carried around out in the weather for any great period of time. Most pistols were kept and carried in cases to protect them.
Because they were so fiddly and a pain in the ass to maintain, a pistol was considered a gentleman's weapon, so an officer in a militia was usually the only one to carry a pistol - he was assumed to be a "gentleman". The average militia man or the day typically kept a musket, or if he was lucky later on, a rifle. Or slings - which were often used in settlements for small game hunting and from what I was told, in several "frontier" militias as back-up when they ran out of ammo. In the hands of a trained slinger, a sling was both more rapid-fire (reports of 5 a minute) and could be as lethal as a pistol or a rifle up to a good 50 yards in distance. And much easier to re-arm with - any dense rock of decent size would do.

Pistols were always handled very carefully so as not to get the powder wet or lose the ball before you fired - and if you left a loaded pistol laying about, the powder would go bad or your pan would get dirty and it wouldn't fire.
The replacement for the powder and ball pistol was the slightly more reliable percussion cap revolver - which was still not really a viable weapon for the general public until the late 1850's. That was 20 years after Colt invented his revolver, as revolvers were such a high-priced specialty item that very few people could afford until he could sell the military on the weapon after the Mexican-American war and the Army contracted a manufacturer to tool up and mass-produce it at cost.
Cartridge bullets, which is what we would now recognize as bullets, allowed the revolver to evolve into what we recognize as a pistol/revolver now.

So, yeah - it's hard to say whether or not the thought and wording of the 2nd Amendment's granting of the right to have and bear a fairly expensive and very difficult to acquire, keep and maintain piece of lethal equipment that was understood to be a critical tool for anyone who lived outside a major city or town as it was written the 1790's was really understood and applicable with the ease and relatively low cost of acquiring, keeping, or maintain firearms as they are now-a-days. The expectations and understanding of what it meant to own a firearm back in the late 17th century/early 18th century has changed. And not necessarily for the better.

Ah, the joys of being and hanging around re-enactors in my youth. I remember the black powder fire-arms exhibitions and contests of the 70's and 80's very well.

Haele