The trailer really doesn't do the unique weapon system justice. It is just unique, and makes you wonder why other games haven't done this already.

Take the starting revolver for example, it's a simple double-action revolver. Lots of games have that. The difference here is there are a few buttons in regards to gun handling, so you have a Reload, Unload and ♥♥♥♥ button.
Reload button performs a quick reload using a speedloader (expendable), which is fastest to get the gun ready in combat.
Unload button unloads your entire clip, and then you have to smash that Reload button to shove the bullets in. If you are stingy with your speedloaders, this is an option.
♥♥♥♥ button ♥♥♥♥♥ the hammer. This turns the double action trigger into single action, which makes follow-up shots more controllable and feels much better.

That's the quick gist of the first gun. With the assault rifle, if you keep using Reload, you will run out of spare mags eventually and have to insert the singular bullet manually directly in the chamber to use the gun. The recommended actions are to either save your mags with Unload, or use other simpler guns like the revolver, or level-action rifle, can't lose your mags if the gun doesn't have them.

The weapon handling is just nice. However there are more casual options for less sophisticated individuals. Oh and I also like the vertical tactical belt that the Martyr wears.

The trailer really doesn't do the unique weapon system justice. It is just unique, and makes you wonder why other games haven't done this already. Take the starting revolver for example, it's a simple double-action revolver. Lots of games have that. The difference here is there are a few buttons in regards to gun handling, so you have a Reload, Unload and Cock button. Reload button performs a quick reload using a speedloader (expendable), which is fastest to get the gun ready in combat. Unload button unloads your entire clip, and then you have to smash that Reload button to shove the bullets in. If you are stingy with your speedloaders, this is an option. Cock button cocks the hammer. This turns the double action trigger into single action, which makes follow-up shots more controllable and feels much better. That's the quick gist of the first gun. With the assault rifle, if you keep using Reload, you will run out of spare mags eventually and have to insert the singular bullet manually directly in the chamber to use the gun. The recommended actions are to either save your mags with Unload, or use other simpler guns like the revolver, or level-action rifle, can't lose your mags if the gun doesn't have them. The weapon handling is just nice. However there are more casual options for less sophisticated individuals. Oh and I also like the vertical tactical belt that the Martyr wears.