How Guns Work — 3D Animations of 1911 and Glock Pistols

These three videos show how the classic Model 1911 pistol works. This pistol requires the hammer to be cocked in order to fire. Watch the video to see the operation of the trigger, hammer, firing pin, and slide. After the round is fired the slide retracts and the cartridge ejects. Then, a new round rises in the magazine and chambers as the slide moves forward back into battery. With the hammer cocked when the slide came back, the m1911 is ready for the next shot.

Striker-Fired Glock Pistol — Modern Design
For comparison with the Model 1911 shown above, this video shows the Glock 19 (Gen 4) pistol with 3D animation. This modern, polymer-framed, striker-fired pistol has constant trigger pull for all shots. Some folks call this a DAO (double-action-only) trigger but that’s not really correct. Unlike the Model 1911, on a Glock there is no external safety on the frame or slide. The trigger “shoe” (the part that contacts finger) includes a central blade. This prevents the gun from firing unless the trigger is depresses normally. Glock calls this the “safe action”.