Which cycle of function occurs after firing the ammunition?

After firing the ammunition, the cycle of functions in a firearm involves the extraction of the spent cartridge casing from the chamber. This is a critical step in the overall operation because it clears the chamber of the fired round, making way for the next cartridge to be chambered.

During the extraction phase, the extractor mechanism engages the rim or groove of the cartridge case, pulling it backward out of the chamber as the bolt moves rearward. This process is essential for maintaining the firearm's ability to continue firing without interruptions.

The subsequent steps, such as ejecting the spent casing, locking the bolt in place, or cocking the firearm, occur after extraction. Therefore, extraction is the correct answer, as it is the first operation that takes place in the cycle following the discharge of a round.