2D pixel glock reloading spritesheets

This is a project still in development,
Im looking for feedback on the format, organization of the files and sprites within the sprite sheet, as i don't know what is most useful for developers, and what they exactly need for their projects. More animations and frames will most likely be drawn.

As so, feedback is most welcome.

Updated with new PNG sequences as seen in the video.

OLD:

"Sprites organized in a grid 64x64.

File contains srpitesheets of a glock:

-cocking without magazine;

-cocking with magazine;

-reloading;

-empty reloading (bolt closed);

-empty reloading with bolt initially open;"