A double action pistol does not load itself. Double action means that the hammer does not have to be cocked separately- pulling the trigger will make the hammer rise and fall- but you still have to chamber a round of ammunition first.
Yes
After a round has been chambered
Often with a semiautomatic pistol, once a loaded magazine is inserted and the slide racked, you now have a pistol that is ready to fire: there is a fresh round in the chamber, the hammer (or striker) is cocked. This CAN be a dangerous situation, if the shooter isn't going to fire the weapon immediately. In the past, a person would have to CAREFULLY lower the hammer while pointing the pistol in a safe direction. If they slipped, they would fire a bullet accidentally AND their thumb would get hurt--mashed by the recoiling slide & hammer. A decocking lever prevents such accidents by LOWERING the cocked hammer to a safe position. Once utilized, if the shooter wanted to prepare the pistol for firing, they would have to: Manually recock the hammer, if the pistol were a single action only type, or, manually recock, or utilize the pistol's long Double Action trigger, if the pistol was a Double Action/Single Action type.
A loaded pistol is not a toy. Any game with a loaded pistol is foolish and unsafe.
No. Strictly speaking, Glocks are "safe-action" which is a Glock proprietary term. Glocks are neither double action nor single action. They have attributes of both types.
LDA is one
No external hammer to allow single action fire.
It is a double action pistol
To turn your tanfoglio gt380 into a double action pistol can take a lot of work. You will have to buy a lot of different parts and a lot of time to make this work.
A double action pistol that chambers a .380 ACP round. AKA 9mm Kurz
A single action pistol, such as the 191A1 .45 Auto, requires that the hammer be cocked before the first shot. A Double Action pistol does not need to have the hammer cocked- pulling the trigger causes the hammer to rise and fall. Some are DAO- Double Action Only- the hammer cannot BE cocked, and must be fired from a "hammer down" position. These include the Para-Ordnance LDA pistols.
Insert a loaded magazine into the magazine well until it clicks in place. Hold the pistol in your firing hand. With your other hand, grasp the serrations on the rear of the slide, pull back, and release. Slide will move forward, chambering a cartridge. Gun is now loaded.