Not the firing pin, but the sear. Yes, it can be done on some guns, however, it's a bad idea for at least two reasons. One, you really need to know what you're doing before trying to alter any gun, and two, in general, it's illegal to own a fully automatic gun without the proper paperwork.
Yes, Colt has and continues to make automatic pistols.
No it is not possible
Need make & model of .25 Auto.
You Can't. This Idea is beyond the capabilities of the pistol.
No, if it was designed to be a single shot, it's a single shot. It needs to be reloaded after each shot.
9x18 is the Makarov cartridge. Browning never made a firearm chambered for it. They did, however, make such a pistol in 9x17 - otherwise known as the .380 Automatic Colt Pistol. It was actually the Beretta 84 'Cheetah', badge engineered and marketed as the Browning BDA 380.
To make an automatic raisin pistol, you'll need a small motor, a power source (like batteries), a container for the raisins, and a mechanism to eject them, such as a simple spring-loaded firing system. First, design a chamber that holds the raisins and connects to a tube that directs them forward. The motor can be set up to activate the ejection mechanism at regular intervals, allowing raisins to be shot out like projectiles. Be cautious and ensure safety measures are in place, as homemade devices can be unpredictable.
I believe he realized a 'single' shot pistol had no advantages in time of conflict or war. He invisioned a weapon firing several rounds before reloading and that led to a multiple firing revolver...............
Wolff gun springs, Brownells, and gunpartscorp would be places to start. You will need to verify make and model of pistol- Brevette is often found on European arms, and is not always the make.
I assume that you are asking about a cap and ball revolver. It's called chain firing. When one cylinder fires, it sets off one or more other cylinders. When you load the pistol, use a lubricated pistol wad between the powder and the ball, or cover the ball with grease such as Crisco, or bore butter. Chain fires can also be caused by loose or poorly fitting caps. Make sure they fit snugly. If the pistol has chain fired, it's best to have it checked out by a gunsmith for damage before firing it again.
Nothing. S&W did not make this.
For the same reason that most things are invented- to be a commercial success, and make money. The semi-auto pistol could be made smaller and lighter than a revolver, hold more ammunition, and reload quicker.